Move extensions-related files to using //components/keyed_service.

This CL removes the usage of //components/browser_context_keyed_service
from:
- //chrome/browser/extensions
- //extensions

It was constructed using the following:
- move_source_file.py --already_moved
- mffr.py
- git cl format

BUG=351704
TBR=yoz

Review URL: https://codereview.chromium.org/197413002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256853 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/menu_manager.h b/chrome/browser/extensions/menu_manager.h
index f609dab..e25e58ac 100644
--- a/chrome/browser/extensions/menu_manager.h
+++ b/chrome/browser/extensions/menu_manager.h
@@ -18,7 +18,7 @@
 #include "base/strings/string16.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_icon_manager.h"
-#include "components/browser_context_keyed_service/browser_context_keyed_service.h"
+#include "components/keyed_service/core/keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/common/url_pattern_set.h"
@@ -267,7 +267,7 @@
 // This class keeps track of menu items added by extensions.
 class MenuManager : public content::NotificationObserver,
                     public base::SupportsWeakPtr<MenuManager>,
-                    public BrowserContextKeyedService {
+                    public KeyedService {
  public:
   MenuManager(Profile* profile, StateStore* store_);
   virtual ~MenuManager();