FBTB: Remove unneeded #includes of base/ref_counted.h and base/string16.h in src/chrome.

chrome/common/extensions/update_manifest.h

Index: chrome/common/extensions/update_manifest.h
diff --git a/chrome/common/extensions/update_manifest.h b/chrome/common/extensions/update_manifest.h
index 1ef0838de923fe12512be642a40ba98a05b12259..9e8eb528c58bffdb7e80ae7738cf94ed63ca0f2d 100644
--- a/chrome/common/extensions/update_manifest.h
+++ b/chrome/common/extensions/update_manifest.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -10,7 +10,6 @@
 #include <vector>
 
 #include "base/logging.h"
-#include "base/scoped_ptr.h"
 #include "googleurl/src/gurl.h"
 
 class UpdateManifest {