Remove //chrome dependency from ExtensionPrefs

chrome/browser/extensions/api/preference/preference_api.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_API_PREFERENCE_PREFERENCE_API_H__
 #define CHROME_BROWSER_EXTENSIONS_API_PREFERENCE_PREFERENCE_API_H__
 
 #include <string>
 
+#include "base/memory/ref_counted.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "chrome/browser/extensions/api/content_settings/content_settings_store.h"
 #include "chrome/browser/extensions/chrome_extension_function.h"
 #include "content/public/browser/notification_observer.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/extension_prefs_scope.h"
 
 class ExtensionPrefValueMap;
 class PrefService;
@@ skipping 59 matching lines @@
   // coming from the incognito preferences, false if it is coming from the
   // normal ones.
   bool DoesExtensionControlPref(const std::string& extension_id,
                                 const std::string& pref_key,
                                 bool* from_incognito);
 
  protected:
   // Virtual for testing.
   virtual ExtensionPrefs* extension_prefs() = 0;
   virtual ExtensionPrefValueMap* extension_pref_value_map() = 0;
+  virtual scoped_refptr<ContentSettingsStore> content_settings_store() = 0;
 };
 
 class PreferenceAPI : public PreferenceAPIBase,
                       public BrowserContextKeyedAPI,
                       public EventRouter::Observer,
                       public ContentSettingsStore::Observer {
  public:
   explicit PreferenceAPI(content::BrowserContext* context);
   virtual ~PreferenceAPI();
 
@@ skipping 15 matching lines @@
   // ContentSettingsStore::Observer implementation.
   virtual void OnContentSettingChanged(const std::string& extension_id,
                                        bool incognito) OVERRIDE;
 
   // Clears incognito session-only content settings for all extensions.
   void ClearIncognitoSessionOnlyContentSettings();
 
   // PreferenceAPIBase implementation.
   virtual ExtensionPrefs* extension_prefs() OVERRIDE;
   virtual ExtensionPrefValueMap* extension_pref_value_map() OVERRIDE;
+  virtual scoped_refptr<ContentSettingsStore> content_settings_store() OVERRIDE;
 
   Profile* profile_;
 
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() {
     return "PreferenceAPI";
   }
   static const bool kServiceIsNULLWhileTesting = true;
   static const bool kServiceRedirectedInIncognito = true;
 
@@ skipping 74 matching lines @@
  protected:
   virtual ~ClearPreferenceFunction();
 
   // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_PREFERENCE_PREFERENCE_API_H__