Enforce the 'requirements' field in manifests.

chrome/browser/extensions/extension_service.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_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 #pragma once
 
 #include <list>
 #include <map>
@@ skipping 66 matching lines @@
 }
 
 namespace extensions {
 class AppSyncData;
 class ComponentLoader;
 class ContentSettingsStore;
 class Extension;
 class ExtensionCookiesEventRouter;
 class ExtensionSyncData;
 class ExtensionUpdater;
+class RequirementsProvider;
 class SettingsFrontend;
 class WebNavigationEventRouter;
 }
 
 // This is an interface class to encapsulate the dependencies that
 // various classes have on ExtensionService. This allows easy mocking.
 class ExtensionServiceInterface : public syncer::SyncableService {
  public:
   // A function that returns true if the given extension should be
   // included and false if it should be filtered out.  Identical to
@@ skipping 747 matching lines @@
   ExtensionWarningSet extension_warnings_;
 
   scoped_ptr<extensions::APIResourceController> api_resource_controller_;
 
   extensions::ProcessMap process_map_;
 
   AppShortcutManager app_shortcut_manager_;
 
   scoped_ptr<ExtensionGlobalError> extension_global_error_;
 
+  // The provider that checks if the extension is supported.
+  scoped_ptr<extensions::RequirementsProvider> requirements_provider_;
+
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            InstallAppsWithUnlimtedStorage);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            InstallAppsAndCheckStorageProtection);
   DISALLOW_COPY_AND_ASSIGN(ExtensionService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_