content: Cleanup class/struct forward declarations

content/browser/accessibility/browser_accessibility.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 CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 30 matching lines @@
 #if defined(OS_LINUX) && defined(USE_X11) && !defined(OS_CHROMEOS)
 #define PLATFORM_HAS_NATIVE_ACCESSIBILITY_IMPL 1
 #endif
 
 #if defined(OS_MACOSX) && __OBJC__
 @class BrowserAccessibilityCocoa;
 #endif
 
 namespace content {
 class BrowserAccessibilityManager;
-#if defined(OS_WIN)
-class BrowserAccessibilityWin;
-#elif defined(OS_LINUX) && !defined(OS_CHROMEOS) && defined(USE_X11)
-class BrowserAccessibilityAuraLinux;
-#endif
 
 ////////////////////////////////////////////////////////////////////////////////
 //
 // BrowserAccessibility
 //
 // A BrowserAccessibility object represents one node in the accessibility
 // tree on the browser side. It exactly corresponds to one WebAXObject from
 // Blink. It's owned by a BrowserAccessibilityManager.
 //
 // There are subclasses of BrowserAccessibility for each platform where
@@ skipping 315 matching lines @@
   // bounds, but "virtual" elements in the accessibility tree that don't
   // correspond to a layed-out element sometimes don't have bounds.
   void FixEmptyBounds(gfx::RectF* bounds) const;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_