Delete obviously unneeded forward declarations in chrome/browser/*.h.

chrome/browser/browser_accessibility_manager_win.h

 // 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.
 
 #ifndef CHROME_BROWSER_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_
 #define CHROME_BROWSER_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_
 #pragma once
 
 #include <atlbase.h>
 #include <atlcom.h>
 #include <oleacc.h>
 
 #include <map>
 
 #include "base/hash_tables.h"
 #include "base/scoped_comptr_win.h"
 #include "base/scoped_ptr.h"
 #include "webkit/glue/webaccessibility.h"
 
 class BrowserAccessibility;
-class RenderProcessHost;
-class RenderWidgetHost;
 
 class BrowserAccessibilityFactory {
  public:
   virtual ~BrowserAccessibilityFactory() {}
 
   // Create an instance of BrowserAccessibility and return a new
   // reference to it.
   virtual BrowserAccessibility* Create();
 };
 
@@ skipping 79 matching lines @@
 
   // The next child ID to use; static so that they're global to the process.
   // Screen readers cache these IDs to see if they've seen the same object
   // before so we should avoid reusing them within the same project.
   static LONG next_child_id_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManager);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_