Move the rest of extension_manifest_constants to top-level extensions/

extensions/common/manifest_constants.h

Index: extensions/common/manifest_constants.h
diff --git a/extensions/common/manifest_constants.h b/extensions/common/manifest_constants.h
index de60410f6af9a61518b685dfcd9e3fa776b61cb2..f87fdf2389a4573e3cb7f02a5f79a4f105a8c210 100644
--- a/extensions/common/manifest_constants.h
+++ b/extensions/common/manifest_constants.h
@@ -5,159 +5,427 @@
 #ifndef EXTENSIONS_COMMON_MANIFEST_CONSTANTS_H_
 #define EXTENSIONS_COMMON_MANIFEST_CONSTANTS_H_
 
-// Keys used in JSON representation of extensions.
 namespace extensions {
+
+// Keys used in JSON representation of extensions.
 namespace manifest_keys {
-  extern const char kAllFrames[];
-  extern const char kAltKey[];
-  extern const char kApp[];
-  extern const char kBackgroundAllowJsAccess[];
-  extern const char kBackgroundPage[];
-  extern const char kBackgroundPageLegacy[];
-  extern const char kBackgroundPersistent[];
-  extern const char kBackgroundScripts[];
-  extern const char kBrowserAction[];
-  extern const char kBrowseURLs[];
-  extern const char kChromeURLOverrides[];
-  extern const char kCommands[];
-  extern const char kContentPack[];
-  extern const char kContentPackSites[];
-  extern const char kContentScripts[];
-  extern const char kContentSecurityPolicy[];
-  extern const char kConvertedFromUserScript[];
-  extern const char kCss[];
-  extern const char kCtrlKey[];
-  extern const char kCurrentLocale[];
-  extern const char kDefaultLocale[];
-  extern const char kDescription[];
-  extern const char kDevToolsPage[];
-  extern const char kDisplayInLauncher[];
-  extern const char kDisplayInNewTabPage[];
-  extern const char kEventName[];
-  extern const char kExcludeGlobs[];
-  extern const char kExcludeMatches[];
-  extern const char kExport[];
-  extern const char kExternallyConnectable[];
-  extern const char kFileAccessList[];
-  extern const char kFileHandlers[];
-  extern const char kFileHandlerExtensions[];
-  extern const char kFileHandlerTitle[];
-  extern const char kFileHandlerTypes[];
-  extern const char kFileFilters[];
-  extern const char kFileBrowserHandlers[];
-  extern const char kMediaGalleriesHandlers[];
-  extern const char kHomepageURL[];
-  extern const char kIcons[];
-  extern const char kId[];
-  extern const char kImport[];
-  extern const char kIncognito[];
-  extern const char kIncludeGlobs[];
-  extern const char kInputComponents[];
-  extern const char kIntentDisposition[];
-  extern const char kIntentHref[];
-  extern const char kIntentPath[];
-  extern const char kIntents[];
-  extern const char kIntentTitle[];
-  extern const char kIntentType[];
-  extern const char kIsolation[];
-  extern const char kJs[];
-  extern const char kKey[];
-  extern const char kKeycode[];
-  extern const char kKioskEnabled[];
-  extern const char kLanguage[];
-  extern const char kLaunch[];
-  extern const char kLaunchContainer[];
-  extern const char kLaunchHeight[];
-  extern const char kLaunchLocalPath[];
-  extern const char kLaunchWebURL[];
-  extern const char kLaunchWidth[];
-  extern const char kLayouts[];
-  extern const char kManifestVersion[];
-  extern const char kMatches[];
-  extern const char kMIMETypes[];
-  extern const char kMimeTypesHandler[];
-  extern const char kMinimumChromeVersion[];
-  extern const char kMinimumVersion[];
-  extern const char kNaClModules[];
-  extern const char kNaClModulesMIMEType[];
-  extern const char kNaClModulesPath[];
-  extern const char kName[];
-  extern const char kOAuth2[];
-  extern const char kOAuth2AutoApprove[];
-  extern const char kOAuth2ClientId[];
-  extern const char kOAuth2Scopes[];
-  extern const char kOfflineEnabled[];
-  extern const char kOmnibox[];
-  extern const char kOmniboxKeyword[];
-  extern const char kOptionalPermissions[];
-  extern const char kOptionsPage[];
-  extern const char kPageAction[];
-  extern const char kPageActionDefaultIcon[];
-  extern const char kPageActionDefaultPopup[];
-  extern const char kPageActionDefaultTitle[];
-  extern const char kPageActionIcons[];
-  extern const char kPageActionId[];
-  extern const char kPageActionPopup[];
-  extern const char kPageActionPopupPath[];
-  extern const char kPageActions[];
-  extern const char kPermissions[];
-  extern const char kPlatformAppBackground[];
-  extern const char kPlatformAppBackgroundPage[];
-  extern const char kPlatformAppBackgroundScripts[];
-  extern const char kPlatformAppContentSecurityPolicy[];
-  extern const char kPlugins[];
-  extern const char kPluginsPath[];
-  extern const char kPluginsPublic[];
-  extern const char kPublicKey[];
-  extern const char kResources[];
-  extern const char kRequirements[];
-  extern const char kRunAt[];
-  extern const char kSandboxedPages[];
-  extern const char kSandboxedPagesCSP[];
-  extern const char kScriptBadge[];
-  extern const char kShiftKey[];
-  extern const char kShortcutKey[];
-  extern const char kShortName[];
-  extern const char kSignature[];
-  extern const char kSpellcheck[];
-  extern const char kSpellcheckDictionaryFormat[];
-  extern const char kSpellcheckDictionaryLanguage[];
-  extern const char kSpellcheckDictionaryLocale[];
-  extern const char kSpellcheckDictionaryPath[];
-  extern const char kStorageManagedSchema[];
-  extern const char kSuggestedKey[];
-  extern const char kSystemIndicator[];
-  extern const char kTheme[];
-  extern const char kThemeColors[];
-  extern const char kThemeDisplayProperties[];
-  extern const char kThemeImages[];
-  extern const char kThemeTints[];
-  extern const char kTtsEngine[];
-  extern const char kTtsGenderFemale[];
-  extern const char kTtsGenderMale[];
-  extern const char kTtsVoices[];
-  extern const char kTtsVoicesEventTypeEnd[];
-  extern const char kTtsVoicesEventTypeError[];
-  extern const char kTtsVoicesEventTypeMarker[];
-  extern const char kTtsVoicesEventTypeSentence[];
-  extern const char kTtsVoicesEventTypeStart[];
-  extern const char kTtsVoicesEventTypeWord[];
-  extern const char kTtsVoicesEventTypes[];
-  extern const char kTtsVoicesGender[];
-  extern const char kTtsVoicesLang[];
-  extern const char kTtsVoicesVoiceName[];
-  extern const char kType[];
-  extern const char kUpdateURL[];
-  extern const char kUrlHandlers[];
-  extern const char kUrlHandlerTitle[];
-  extern const char kVersion[];
-  extern const char kWebAccessibleResources[];
-  extern const char kWebURLs[];
+
+extern const char kAllFrames[];
+extern const char kAltKey[];
+extern const char kApp[];
+extern const char kBackgroundAllowJsAccess[];
+extern const char kBackgroundPage[];
+extern const char kBackgroundPageLegacy[];
+extern const char kBackgroundPersistent[];
+extern const char kBackgroundScripts[];
+extern const char kBrowserAction[];
+extern const char kBrowseURLs[];
+extern const char kChromeURLOverrides[];
+extern const char kCommands[];
+extern const char kContentPack[];
+extern const char kContentPackSites[];
+extern const char kContentScripts[];
+extern const char kContentSecurityPolicy[];
+extern const char kConvertedFromUserScript[];
+extern const char kCss[];
+extern const char kCtrlKey[];
+extern const char kCurrentLocale[];
+extern const char kDefaultLocale[];
+extern const char kDescription[];
+extern const char kDevToolsPage[];
+extern const char kDisplayInLauncher[];
+extern const char kDisplayInNewTabPage[];
+extern const char kEventName[];
+extern const char kExcludeGlobs[];
+extern const char kExcludeMatches[];
+extern const char kExport[];
+extern const char kExternallyConnectable[];
+extern const char kFileAccessList[];
+extern const char kFileHandlers[];
+extern const char kFileHandlerExtensions[];
+extern const char kFileHandlerTitle[];
+extern const char kFileHandlerTypes[];
+extern const char kFileFilters[];
+extern const char kFileBrowserHandlers[];
+extern const char kMediaGalleriesHandlers[];
+extern const char kHomepageURL[];
+extern const char kIcons[];
+extern const char kId[];
+extern const char kImport[];
+extern const char kIncognito[];
+extern const char kIncludeGlobs[];
+extern const char kInputComponents[];
+extern const char kIntentDisposition[];
+extern const char kIntentHref[];
+extern const char kIntentPath[];
+extern const char kIntents[];
+extern const char kIntentTitle[];
+extern const char kIntentType[];
+extern const char kIsolation[];
+extern const char kJs[];
+extern const char kKey[];
+extern const char kKeycode[];
+extern const char kKioskEnabled[];
+extern const char kLanguage[];
+extern const char kLaunch[];
+extern const char kLaunchContainer[];
+extern const char kLaunchHeight[];
+extern const char kLaunchLocalPath[];
+extern const char kLaunchWebURL[];
+extern const char kLaunchWidth[];
+extern const char kLayouts[];
+extern const char kManifestVersion[];
+extern const char kMatches[];
+extern const char kMIMETypes[];
+extern const char kMimeTypesHandler[];
+extern const char kMinimumChromeVersion[];
+extern const char kMinimumVersion[];
+extern const char kNaClModules[];
+extern const char kNaClModulesMIMEType[];
+extern const char kNaClModulesPath[];
+extern const char kName[];
+extern const char kOAuth2[];
+extern const char kOAuth2AutoApprove[];
+extern const char kOAuth2ClientId[];
+extern const char kOAuth2Scopes[];
+extern const char kOfflineEnabled[];
+extern const char kOmnibox[];
+extern const char kOmniboxKeyword[];
+extern const char kOptionalPermissions[];
+extern const char kOptionsPage[];
+extern const char kPageAction[];
+extern const char kPageActionDefaultIcon[];
+extern const char kPageActionDefaultPopup[];
+extern const char kPageActionDefaultTitle[];
+extern const char kPageActionIcons[];
+extern const char kPageActionId[];
+extern const char kPageActionPopup[];
+extern const char kPageActionPopupPath[];
+extern const char kPageActions[];
+extern const char kPermissions[];
+extern const char kPlatformAppBackground[];
+extern const char kPlatformAppBackgroundPage[];
+extern const char kPlatformAppBackgroundScripts[];
+extern const char kPlatformAppContentSecurityPolicy[];
+extern const char kPlugins[];
+extern const char kPluginsPath[];
+extern const char kPluginsPublic[];
+extern const char kPublicKey[];
+extern const char kResources[];
+extern const char kRequirements[];
+extern const char kRunAt[];
+extern const char kSandboxedPages[];
+extern const char kSandboxedPagesCSP[];
+extern const char kScriptBadge[];
+extern const char kShiftKey[];
+extern const char kShortcutKey[];
+extern const char kShortName[];
+extern const char kSignature[];
+extern const char kSpellcheck[];
+extern const char kSpellcheckDictionaryFormat[];
+extern const char kSpellcheckDictionaryLanguage[];
+extern const char kSpellcheckDictionaryLocale[];
+extern const char kSpellcheckDictionaryPath[];
+extern const char kStorageManagedSchema[];
+extern const char kSuggestedKey[];
+extern const char kSystemIndicator[];
+extern const char kTheme[];
+extern const char kThemeColors[];
+extern const char kThemeDisplayProperties[];
+extern const char kThemeImages[];
+extern const char kThemeTints[];
+extern const char kTtsEngine[];
+extern const char kTtsGenderFemale[];
+extern const char kTtsGenderMale[];
+extern const char kTtsVoices[];
+extern const char kTtsVoicesEventTypeEnd[];
+extern const char kTtsVoicesEventTypeError[];
+extern const char kTtsVoicesEventTypeMarker[];
+extern const char kTtsVoicesEventTypeSentence[];
+extern const char kTtsVoicesEventTypeStart[];
+extern const char kTtsVoicesEventTypeWord[];
+extern const char kTtsVoicesEventTypes[];
+extern const char kTtsVoicesGender[];
+extern const char kTtsVoicesLang[];
+extern const char kTtsVoicesVoiceName[];
+extern const char kType[];
+extern const char kUpdateURL[];
+extern const char kUrlHandlers[];
+extern const char kUrlHandlerTitle[];
+extern const char kVersion[];
+extern const char kWebAccessibleResources[];
+extern const char kWebURLs[];
+
 }  // namespace manifest_keys
 
+// Some values expected in manifests.
+namespace manifest_values {
+
+extern const char kBrowserActionCommandEvent[];
+extern const char kIncognitoSplit[];
+extern const char kIncognitoSpanning[];
+extern const char kIntentDispositionWindow[];
+extern const char kIntentDispositionInline[];
+extern const char kIsolatedStorage[];
+extern const char kKeybindingPlatformChromeOs[];
+extern const char kKeybindingPlatformDefault[];
+extern const char kKeybindingPlatformLinux[];
+extern const char kKeybindingPlatformMac[];
+extern const char kKeybindingPlatformWin[];
+extern const char kKeyAlt[];
+extern const char kKeyShift[];
+extern const char kKeyCommand[];
+extern const char kKeyCtrl[];
+extern const char kKeyComma[];
+extern const char kKeyDel[];
+extern const char kKeyDown[];
+extern const char kKeyHome[];
+extern const char kKeyEnd[];
+extern const char kKeyIns[];
+extern const char kKeyLeft[];
+extern const char kKeyMacCtrl[];
+extern const char kKeyMediaNextTrack[];
+extern const char kKeyMediaPlayPause[];
+extern const char kKeyMediaPrevTrack[];
+extern const char kKeyMediaStop[];
+extern const char kKeyPgDwn[];
+extern const char kKeyPgUp[];
+extern const char kKeyPeriod[];
+extern const char kKeyRight[];
+extern const char kKeySeparator[];
+extern const char kKeyTab[];
+extern const char kKeyUp[];
+extern const char kLaunchContainerPanel[];
+extern const char kLaunchContainerTab[];
+extern const char kLaunchContainerWindow[];
+extern const char kPageActionCommandEvent[];
+extern const char kPageActionTypePermanent[];
+extern const char kPageActionTypeTab[];
+extern const char kScriptBadgeCommandEvent[];
+extern const char kRunAtDocumentEnd[];
+extern const char kRunAtDocumentIdle[];
+extern const char kRunAtDocumentStart[];
+
+}  // manifest_values
+
+// Error messages returned from extension installation.
 namespace manifest_errors {
+
+extern const char kAppsNotEnabled[];
+extern const char kBackgroundPermissionNeeded[];
+extern const char kBackgroundRequiredForPlatformApps[];
+extern const char kCannotAccessChromeUrl[];
+extern const char kCannotAccessExtensionUrl[];
+extern const char kCannotAccessPage[];
+extern const char kCannotChangeExtensionID[];
+extern const char kCannotClaimAllHostsInExtent[];
+extern const char kCannotClaimAllURLsInExtent[];
+extern const char kCannotScriptGallery[];
+extern const char kCannotScriptSigninPage[];
+extern const char kCannotUninstallManagedExtension[];
+extern const char kChromeVersionTooLow[];
+extern const char kDevToolsExperimental[];
+extern const char kDisabledByPolicy[];
+extern const char kExperimentalFlagRequired[];
+extern const char kExpectString[];
+extern const char kInvalidAllFrames[];
+extern const char kInvalidBackground[];
+extern const char kInvalidBackgroundAllowJsAccess[];
+extern const char kInvalidBackgroundCombination[];
+extern const char kInvalidBackgroundScript[];
+extern const char kInvalidBackgroundScripts[];
+extern const char kInvalidBackgroundInHostedApp[];
+extern const char kInvalidBackgroundPersistent[];
+extern const char kInvalidBackgroundPersistentNoPage[];
+extern const char kInvalidBrowserAction[];
+extern const char kInvalidBrowseURL[];
+extern const char kInvalidBrowseURLs[];
+extern const char kInvalidChromeURLOverrides[];
+extern const char kInvalidCommandsKey[];
+extern const char kInvalidContentPack[];
+extern const char kInvalidContentPackSites[];
+extern const char kInvalidContentScript[];
+extern const char kInvalidContentScriptsList[];
+extern const char kInvalidContentSecurityPolicy[];
+extern const char kInvalidCss[];
+extern const char kInvalidCssList[];
+extern const char kInvalidDefaultLocale[];
+extern const char kInvalidDescription[];
+extern const char kInvalidDevToolsPage[];
+extern const char kInvalidDisplayInLauncher[];
+extern const char kInvalidDisplayInNewTabPage[];
+extern const char kInvalidExcludeMatch[];
+extern const char kInvalidExcludeMatches[];
+extern const char kInvalidExport[];
+extern const char kInvalidExportPermissions[];
+extern const char kInvalidExportResources[];
+extern const char kInvalidExportResourcesString[];
+extern const char kInvalidFileAccessList[];
+extern const char kInvalidFileAccessValue[];
+extern const char kInvalidFileBrowserHandler[];
+extern const char kInvalidFileBrowserHandlerMIMETypes[];
+extern const char kInvalidMediaGalleriesHandler[];
+extern const char kInvalidFileFiltersList[];
+extern const char kInvalidFileFilterValue[];
+extern const char kInvalidFileHandlers[];
+extern const char kInvalidFileHandlerExtension[];
+extern const char kInvalidFileHandlerExtensionElement[];
+extern const char kInvalidFileHandlerNoTypeOrExtension[];
+extern const char kInvalidFileHandlerTitle[];
+extern const char kInvalidFileHandlerType[];
+extern const char kInvalidFileHandlerTypeElement[];
+extern const char kInvalidGlob[];
+extern const char kInvalidGlobList[];
+extern const char kInvalidHomepageURL[];
+extern const char kInvalidIconPath[];
+extern const char kInvalidIcons[];
+extern const char kInvalidImport[];
+extern const char kInvalidImportAndExport[];
+extern const char kInvalidImportId[];
+extern const char kInvalidImportVersion[];
+extern const char kInvalidIncognitoBehavior[];
+extern const char kInvalidInputComponents[];
+extern const char kInvalidInputComponentDescription[];
+extern const char kInvalidInputComponentLayoutName[];
+extern const char kInvalidInputComponentName[];
+extern const char kInvalidInputComponentShortcutKey[];
+extern const char kInvalidInputComponentShortcutKeycode[];
+extern const char kInvalidInputComponentType[];
+extern const char kInvalidIntent[];
+extern const char kInvalidIntentDisposition[];
+extern const char kInvalidIntentDispositionInPlatformApp[];
+extern const char kInvalidIntentHref[];
+extern const char kInvalidIntentHrefEmpty[];
+extern const char kInvalidIntentHrefInPlatformApp[];
+extern const char kInvalidIntentHrefOldAndNewKey[];
+extern const char kInvalidIntentPageInHostedApp[];
+extern const char kInvalidIntents[];
+extern const char kInvalidIntentType[];
+extern const char kInvalidIntentTypeElement[];
+extern const char kInvalidIntentTitle[];
+extern const char kInvalidIsolation[];
+extern const char kInvalidIsolationValue[];
+extern const char kInvalidJs[];
+extern const char kInvalidJsList[];
+extern const char kInvalidKey[];
+extern const char kInvalidKeyBinding[];
+extern const char kInvalidKeyBindingDescription[];
+extern const char kInvalidKeyBindingDictionary[];
+extern const char kInvalidKeyBindingMediaKeyWithModifier[];
+extern const char kInvalidKeyBindingMissingPlatform[];
+extern const char kInvalidKeyBindingTooMany[];
+extern const char kInvalidKeyBindingUnknownPlatform[];
+extern const char kInvalidKioskEnabled[];
+extern const char kInvalidLaunchContainer[];
+extern const char kInvalidLaunchValue[];
+extern const char kInvalidLaunchValueContainer[];
+extern const char kInvalidManifest[];
+extern const char kInvalidManifestVersion[];
+extern const char kInvalidManifestVersionOld[];
+extern const char kInvalidMatch[];
+extern const char kInvalidMatchCount[];
+extern const char kInvalidMatches[];
+extern const char kInvalidMIMETypes[];
+extern const char kInvalidMimeTypesHandler[];
+extern const char kInvalidMinimumChromeVersion[];
+extern const char kInvalidNaClModules[];
+extern const char kInvalidNaClModulesMIMEType[];
+extern const char kInvalidNaClModulesPath[];
+extern const char kInvalidName[];
+extern const char kInvalidOAuth2AutoApprove[];
+extern const char kInvalidOAuth2ClientId[];
+extern const char kInvalidOAuth2Scopes[];
+extern const char kInvalidOfflineEnabled[];
+extern const char kInvalidOmniboxKeyword[];
+extern const char kInvalidOptionsPage[];
+extern const char kInvalidOptionsPageExpectUrlInPackage[];
+extern const char kInvalidOptionsPageInHostedApp[];
+extern const char kInvalidPageAction[];
+extern const char kInvalidPageActionDefaultTitle[];
+extern const char kInvalidPageActionIconPath[];
+extern const char kInvalidPageActionId[];
+extern const char kInvalidPageActionName[];
+extern const char kInvalidPageActionOldAndNewKeys[];
+extern const char kInvalidPageActionPopup[];
+extern const char kInvalidPageActionPopupHeight[];
+extern const char kInvalidPageActionPopupPath[];
+extern const char kInvalidPageActionsList[];
+extern const char kInvalidPageActionsListSize[];
+extern const char kInvalidPageActionTypeValue[];
+extern const char kInvalidPermission[];
+extern const char kInvalidPermissions[];
+extern const char kInvalidPermissionScheme[];
+extern const char kInvalidPlugins[];
+extern const char kInvalidPluginsPath[];
+extern const char kInvalidPluginsPublic[];
+extern const char kInvalidRequirement[];
+extern const char kInvalidRequirements[];
+extern const char kInvalidRunAt[];
+extern const char kInvalidSandboxedPagesList[];
+extern const char kInvalidSandboxedPage[];
+extern const char kInvalidSandboxedPagesCSP[];
+extern const char kInvalidScriptBadge[];
+extern const char kInvalidShortName[];
+extern const char kInvalidSignature[];
+extern const char kInvalidSpellcheck[];
+extern const char kInvalidSpellcheckDictionaryFormat[];
+extern const char kInvalidSpellcheckDictionaryLanguage[];
+extern const char kInvalidSpellcheckDictionaryLocale[];
+extern const char kInvalidSpellcheckDictionaryPath[];
+extern const char kInvalidSystemIndicator[];
+extern const char kInvalidTheme[];
+extern const char kInvalidThemeColors[];
+extern const char kInvalidThemeImages[];
+extern const char kInvalidThemeImagesMissing[];
+extern const char kInvalidThemeTints[];
+extern const char kInvalidTts[];
+extern const char kInvalidTtsVoices[];
+extern const char kInvalidTtsVoicesEventTypes[];
+extern const char kInvalidTtsVoicesGender[];
+extern const char kInvalidTtsVoicesLang[];
+extern const char kInvalidTtsVoicesVoiceName[];
+extern const char kInvalidUpdateURL[];
+extern const char kInvalidURLPatternError[];
+extern const char kInvalidURLHandlers[];
+extern const char kInvalidURLHandlerPatternElement[];
+extern const char kInvalidURLHandlerTitle[];
+extern const char kInvalidURLHandlerPattern[];
+extern const char kInvalidVersion[];
+extern const char kInvalidWebAccessibleResourcesList[];
+extern const char kInvalidWebAccessibleResource[];
+extern const char kInvalidWebURL[];
+extern const char kInvalidWebURLs[];
+extern const char kInvalidZipHash[];
+extern const char kInsecureContentSecurityPolicy[];
+extern const char kLaunchPathAndExtentAreExclusive[];
+extern const char kLaunchPathAndURLAreExclusive[];
+extern const char kLaunchURLRequired[];
+extern const char kLocalesMessagesFileMissing[];
+extern const char kLocalesNoDefaultLocaleSpecified[];
+extern const char kLocalesNoDefaultMessages[];
+extern const char kLocalesNoValidLocaleNamesListed[];
+extern const char kLocalesTreeMissing[];
+extern const char kManifestParseError[];
+extern const char kManifestUnreadable[];
+extern const char kMissingFile[];
+extern const char kMultipleOverrides[];
+extern const char kNoPermissionForMIMETypes[];
+extern const char kNoWildCardsInPaths[];
+extern const char kOneUISurfaceOnly[];
+extern const char kPermissionMustBeOptional[];
+extern const char kPermissionNotAllowed[];
+extern const char kPermissionNotAllowedInManifest[];
 extern const char kPermissionUnknownOrMalformed[];
+extern const char kReservedMessageFound[];
 extern const char kUnrecognizedManifestKey[];
+extern const char kScriptBadgeRequiresFlag[];
+extern const char kScriptBadgeIconIgnored[];
+extern const char kScriptBadgeTitleIgnored[];
+extern const char kWebRequestConflictsWithLazyBackground[];
+#if defined(OS_CHROMEOS)
+extern const char kIllegalPlugins[];
+#endif
+
 }  // namespace manifest_errors
 
 }  // namespace extensions