Polish the keybinding implementation a bit.

chrome/common/extensions/extension_manifest_constants.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_MANIFEST_CONSTANTS_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_MANIFEST_CONSTANTS_H_
 #pragma once
 
 #include <string>
 
@@ skipping 85 matching lines @@
   extern const char kPlatformApp[];
   extern const char kPlugins[];
   extern const char kPluginsPath[];
   extern const char kPluginsPublic[];
   extern const char kPublicKey[];
   extern const char kRequirements[];
   extern const char kRunAt[];
   extern const char kShiftKey[];
   extern const char kShortcutKey[];
   extern const char kSignature[];
+  extern const char kSuggestedKey[];
   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[];
@@ skipping 14 matching lines @@
 }  // namespace extension_manifest_keys
 
 // Some values expected in manifests.
 namespace extension_manifest_values {
   extern const char kBrowserActionKeybindingEvent[];
   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 kLaunchContainerPanel[];
   extern const char kLaunchContainerShell[];
   extern const char kLaunchContainerTab[];
   extern const char kLaunchContainerWindow[];
   extern const char kPageActionKeybindingEvent[];
   extern const char kPageActionTypePermanent[];
   extern const char kPageActionTypeTab[];
   extern const char kRunAtDocumentEnd[];
   extern const char kRunAtDocumentIdle[];
   extern const char kRunAtDocumentStart[];
@@ skipping 69 matching lines @@
   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 kInvalidKeyBindingMissingPlatform[];
+  extern const char kInvalidKeyBindingUnknownPlatform[];
   extern const char kInvalidLaunchContainer[];
   extern const char kInvalidLaunchContainerForNonPlatform[];
   extern const char kInvalidLaunchContainerForPlatform[];
   extern const char kInvalidLaunchValue[];
   extern const char kInvalidLaunchValueContainer[];
   extern const char kInvalidManifest[];
   extern const char kInvalidManifestVersion[];
   extern const char kInvalidMatch[];
   extern const char kInvalidMatchCount[];
   extern const char kInvalidMatches[];
@@ skipping 67 matching lines @@
   extern const char kPlatformAppFlagRequired[];
   extern const char kOneUISurfaceOnly[];
   extern const char kReservedMessageFound[];
   extern const char kWebContentMustBeEnabled[];
 #if defined(OS_CHROMEOS)
   extern const char kIllegalPlugins[];
 #endif
 }  // namespace extension_manifest_errors
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_MANIFEST_CONSTANTS_H_