Revert of Fixes for contenteditable caret and selection handling in Windows.

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 <map>
 #include <utility>
 #include <vector>
@@ skipping 166 matching lines @@
 
   typedef base::StringPairs HtmlAttributes;
   const HtmlAttributes& GetHtmlAttributes() const;
 
   // Returns true if this is a native platform-specific object, vs a
   // cross-platform generic object. Don't call ToBrowserAccessibilityXXX if
   // IsNative returns false.
   virtual bool IsNative() const;
 
 #if defined(OS_MACOSX) && __OBJC__
-  const BrowserAccessibilityCocoa* ToBrowserAccessibilityCocoa() const;
   BrowserAccessibilityCocoa* ToBrowserAccessibilityCocoa();
 #elif defined(OS_WIN)
-  const BrowserAccessibilityWin* ToBrowserAccessibilityWin() const;
   BrowserAccessibilityWin* ToBrowserAccessibilityWin();
 #elif defined(OS_LINUX) && !defined(OS_CHROMEOS) && defined(USE_X11)
-  const BrowserAccessibilityAuraLinux* ToBrowserAccessibilityAuraLinux() const;
   BrowserAccessibilityAuraLinux* ToBrowserAccessibilityAuraLinux();
 #endif
 
   // Accessing accessibility attributes:
   //
   // There are dozens of possible attributes for an accessibility node,
   // but only a few tend to apply to any one object, so we store them
   // in sparse arrays of <attribute id, attribute value> pairs, organized
   // by type (bool, int, float, string, int list).
   //
@@ skipping 94 matching lines @@
   // its nearest scrollable ancestor) to local bounds (which are relative
   // to the top of the web accessibility tree).
   gfx::Rect ElementBoundsToLocalBounds(gfx::Rect bounds) const;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_