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

chrome/browser/ui/browser_navigator_browsertest.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_BROWSER_NAVIGATOR_BROWSERTEST_H_
 #define CHROME_BROWSER_UI_BROWSER_NAVIGATOR_BROWSERTEST_H_
 
 #include "chrome/browser/ui/browser.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "content/public/browser/notification_types.h"
 
-class GURL;
 class Profile;
 class TabContentsWrapper;
 
 namespace browser {
 struct NavigateParams;
 }
 
 // Browsertest class for testing the browser navigation. It is also a base class
 // for the |BrowserGuestModeNavigation| which tests navigation while in guest
 // mode.
@@ skipping 11 matching lines @@
   void RunSuppressTest(WindowOpenDisposition disposition);
 
   // content::NotificationObserver:
   virtual void Observe(int type, const content::NotificationSource& source,
                        const content::NotificationDetails& details);
 
   size_t created_tab_contents_count_;
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_NAVIGATOR_BROWSERTEST_H_