Cleanup: Remove forward declarations in various chrome/browser directories.

chrome/browser/ui/tab_contents/tab_contents_wrapper.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_TAB_CONTENTS_TAB_CONTENTS_WRAPPER_H_
 #define CHROME_BROWSER_UI_TAB_CONTENTS_TAB_CONTENTS_WRAPPER_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 14 matching lines @@
 class AutomationTabHelper;
 class BlockedContentTabHelper;
 class BookmarkTabHelper;
 class ConstrainedWindowTabHelper;
 class DownloadRequestLimiterObserver;
 class Extension;
 class ExtensionTabHelper;
 class ExtensionWebNavigationTabObserver;
 class ExternalProtocolObserver;
 class FaviconTabHelper;
-class FileSelectObserver;
 class FindTabHelper;
 class InfoBarTabHelper;
 class HistoryTabHelper;
 class NavigationController;
 class OmniboxSearchHint;
 class PasswordManager;
 class PasswordManagerDelegate;
 class PluginObserver;
 class Profile;
 class RestoreTabHelper;
@@ skipping 287 matching lines @@
 
   // The supporting objects need to outlive the TabContents dtor (as they may
   // be called upon during its execution). As a result, this must come last
   // in the list.
   scoped_ptr<TabContents> tab_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContentsWrapper);
 };
 
 #endif  // CHROME_BROWSER_UI_TAB_CONTENTS_TAB_CONTENTS_WRAPPER_H_