Move content settings extension API to content_settings dir.

chrome/browser/extensions/extension_service.h

Index: chrome/browser/extensions/extension_service.h
diff --git a/chrome/browser/extensions/extension_service.h b/chrome/browser/extensions/extension_service.h
index 928b96e76e0091f4ee1e5db87779882705f0946c..7c36f8ca35dea044a15c9ffe705983493382ff33 100644
--- a/chrome/browser/extensions/extension_service.h
+++ b/chrome/browser/extensions/extension_service.h
@@ -51,7 +51,6 @@ class AppNotificationManager;
 class BookmarkExtensionEventRouter;
 class CrxInstaller;
 class ExtensionBrowserEventRouter;
-class ExtensionContentSettingsStore;
 class ExtensionDownloadsEventRouter;
 class ExtensionFontSettingsEventRouter;
 class ExtensionGlobalError;
@@ -78,6 +77,7 @@ namespace extensions {
 class APIResourceController;
 class AppSyncData;
 class ComponentLoader;
+class ContentSettingsStore;
 class ExtensionCookiesEventRouter;
 class ExtensionSyncData;
 class ExtensionUpdater;
@@ -473,7 +473,7 @@ class ExtensionService
 
   extensions::SettingsFrontend* settings_frontend();
 
-  ExtensionContentSettingsStore* GetExtensionContentSettingsStore();
+  extensions::ContentSettingsStore* GetContentSettingsStore();
 
   // Whether the extension service is ready.
   virtual bool is_ready() OVERRIDE;