Cleanup: Remove unneeded forward declarations from various chrome/browser subdirectories.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/8539006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@109987 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/notifications/notification_object_proxy.h b/chrome/browser/notifications/notification_object_proxy.h
index 0c84c3a..efb0fc16 100644
--- a/chrome/browser/notifications/notification_object_proxy.h
+++ b/chrome/browser/notifications/notification_object_proxy.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -10,11 +10,6 @@
 
 #include "chrome/browser/notifications/notification_delegate.h"
 
-class MessageLoop;
-namespace IPC {
-class Message;
-}
-
 // A NotificationObjectProxy stands in for the JavaScript Notification object
 // which corresponds to a notification toast on the desktop.  It can be signaled
 // when various events occur regarding the desktop notification, and the