Enforce the 'requirements' field in manifests.

chrome/common/extensions/extension.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_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_H_
 
 #include <algorithm>
 #include <iosfwd>
 #include <map>
@@ skipping 94 matching lines @@
     DEPRECATED_DISABLE_PERMISSIONS_INCREASE,
     DEPRECATED_DISABLE_RELOAD,
     DEPRECATED_DISABLE_LAST,  // Not used.
   };
 
   enum DisableReason {
     DISABLE_NONE = 0,
     DISABLE_USER_ACTION = 1 << 0,
     DISABLE_PERMISSIONS_INCREASE = 1 << 1,
     DISABLE_RELOAD = 1 << 2,
+    DISABLE_UNSUPPORTED_REQUIREMENT = 1 << 3
   };
 
   enum InstallType {
     INSTALL_ERROR,
     DOWNGRADE,
     REINSTALL,
     UPGRADE,
     NEW_INSTALL
   };
 
   // Do not change the order of entries or remove entries in this list
   // as this is used in UMA_HISTOGRAM_ENUMERATIONs about extensions.
   enum Type {
     TYPE_UNKNOWN = 0,
     TYPE_EXTENSION,
     TYPE_THEME,
     TYPE_USER_SCRIPT,
     TYPE_HOSTED_APP,
     TYPE_PACKAGED_APP,
     TYPE_PLATFORM_APP
   };
 
   enum SyncType {
     SYNC_TYPE_NONE = 0,
     SYNC_TYPE_EXTENSION,
     SYNC_TYPE_APP
   };
 
+  // Declared requirements for the extension.
+  struct Requirements {
+    Requirements();
+    ~Requirements();
+
+    bool webgl;
+    bool css3d;
+    bool npapi;
+  };
+
   // An NPAPI plugin included in the extension.
   struct PluginInfo {
     FilePath path;  // Path to the plugin.
     bool is_public;  // False if only this extension can load this plugin.
   };
 
   // An NaCl module included in the extension.
   struct NaClModuleInfo {
     GURL url;
     std::string mime_type;
@@ skipping 432 matching lines @@
   // |permissions|.
   void UpdateTabSpecificPermissions(
       int tab_id,
       scoped_refptr<const PermissionSet> permissions) const;
 
   // Clears the tab-specific permissions of |tab_id|.
   void ClearTabSpecificPermissions(int tab_id) const;
 
   // Accessors:
 
+  const Requirements& requirements() const { return requirements_; }
   const FilePath& path() const { return path_; }
   const GURL& url() const { return extension_url_; }
   Location location() const;
   const std::string& id() const;
   const Version* version() const { return version_.get(); }
   const std::string VersionString() const;
   const std::string& name() const { return name_; }
   const std::string& non_localized_name() const { return non_localized_name_; }
   // Base64-encoded version of the key used to sign this extension.
   // In pseudocode, returns
@@ skipping 218 matching lines @@
   bool LoadDescription(string16* error);
   bool LoadManifestVersion(string16* error);
   bool LoadHomepageURL(string16* error);
   bool LoadUpdateURL(string16* error);
   bool LoadIcons(string16* error);
   bool LoadCommands(string16* error);
   bool LoadPlugins(string16* error);
   bool LoadNaClModules(string16* error);
   bool LoadWebAccessibleResources(string16* error);
   bool LoadSandboxedPages(string16* error);
+  // Must be called after LoadPlugins().
+  bool LoadRequirements(string16* error);
   bool LoadDefaultLocale(string16* error);
   bool LoadOfflineEnabled(string16* error);
   bool LoadOptionsPage(string16* error);
   bool LoadBackgroundScripts(string16* error);
   bool LoadBackgroundScripts(const std::string& key, string16* error);
   bool LoadBackgroundPage(const APIPermissionSet& api_permissions,
                           string16* error);
   bool LoadBackgroundPage(const std::string& key,
                           const APIPermissionSet& api_permissions,
                           string16* error);
@@ skipping 83 matching lines @@
   // Custom checks for the experimental permission that can't be expressed in
   // _permission_features.json.
   bool CanSpecifyExperimentalPermission() const;
 
   // Checks whether the host |pattern| is allowed for this extension, given API
   // permissions |permissions|.
   bool CanSpecifyHostPermission(const URLPattern& pattern,
       const APIPermissionSet& permissions) const;
 
   bool CheckMinimumChromeVersion(string16* error) const;
-  bool CheckRequirements(string16* error) const;
 
   // Check that platform app features are valid. Called after InitFromValue.
   bool CheckPlatformAppFeatures(std::string* utf8_error) const;
 
   // Check that features don't conflict. Called after InitFromValue.
   bool CheckConflictingFeatures(std::string* utf8_error) const;
 
   // Cached images for this extension. This should only be touched on the UI
   // thread.
   mutable ImageCache image_cache_;
 
   // The extension's human-readable name. Name is used for display purpose. It
   // might be wrapped with unicode bidi control characters so that it is
   // displayed correctly in RTL context.
   // NOTE: Name is UTF-8 and may contain non-ascii characters.
   std::string name_;
 
   // A non-localized version of the extension's name. This is useful for
   // debug output.
   std::string non_localized_name_;
 
   // The version of this extension's manifest. We increase the manifest
   // version when making breaking changes to the extension system.
   // Version 1 was the first manifest version (implied by a lack of a
   // manifest_version attribute in the extension's manifest). We initialize
   // this member variable to 0 to distinguish the "uninitialized" case from
   // the case when we know the manifest version actually is 1.
   int manifest_version_;
 
+  // The requirements declared in the manifest.
+  Requirements requirements_;
+
   // The absolute path to the directory the extension is stored in.
   FilePath path_;
 
   // Default locale for fall back. Can be empty if extension is not localized.
   std::string default_locale_;
 
   // If true, a separate process will be used for the extension in incognito
   // mode.
   bool incognito_split_mode_;
 
@@ skipping 239 matching lines @@
 
   UpdatedExtensionPermissionsInfo(
       const Extension* extension,
       const PermissionSet* permissions,
       Reason reason);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_H_