Remove obviously unneeded forward declarations in chrome/browser/[abef]*/*.h.

chrome/browser/extensions/execute_code_in_tab_function.h

Index: chrome/browser/extensions/execute_code_in_tab_function.h
diff --git a/chrome/browser/extensions/execute_code_in_tab_function.h b/chrome/browser/extensions/execute_code_in_tab_function.h
index 4913e054c95bce10e19a504d216419d21deb9af6..11b9cd8445cdb878e2f209ae7b7cb9116b004de9 100644
--- a/chrome/browser/extensions/execute_code_in_tab_function.h
+++ b/chrome/browser/extensions/execute_code_in_tab_function.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.
 
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <string>
-#include <vector>
 
 #include "base/file_path.h"
 #include "chrome/browser/extensions/extension_function.h"
@@ -15,8 +14,6 @@
 #include "chrome/common/notification_service.h"
 #include "chrome/common/notification_registrar.h"
 
-class MessageLoop;
-
 // Implement API call tabs.executeScript and tabs.insertCSS.
 class ExecuteCodeInTabFunction : public AsyncExtensionFunction,
                                  public NotificationObserver {