chrome: Cleanup class/struct forward declarations

chrome/test/base/browser_with_test_window_test.h

 // Copyright (c) 2012 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_TEST_BASE_BROWSER_WITH_TEST_WINDOW_TEST_H_
 #define CHROME_TEST_BASE_BROWSER_WITH_TEST_WINDOW_TEST_H_
 
 #include "base/at_exit.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 25 matching lines @@
 }
 }
 #elif defined(TOOLKIT_VIEWS)
 namespace views {
 class ScopedViewsTestHelper;
 }
 #endif
 
 namespace content {
 class NavigationController;
-class WebContents;
 }
 
 // Base class for browser based unit tests. BrowserWithTestWindowTest creates a
 // Browser with a TestingProfile and TestBrowserWindow. To add a tab use
 // AddTab. For example, the following adds a tab and navigates to
 // two URLs that target the TestWebContents:
 //
 //   // Add a new tab and navigate it. This will be at index 0.
 //   AddTab(browser(), GURL("http://foo/1"));
 //   NavigationController* controller =
@@ skipping 128 matching lines @@
   // The type of browser to create (tabbed or popup).
   Browser::Type browser_type_;
 
   // Whether the browser is part of a hosted app.
   bool hosted_app_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserWithTestWindowTest);
 };
 
 #endif  // CHROME_TEST_BASE_BROWSER_WITH_TEST_WINDOW_TEST_H_