Fix race in BrowserAccessibilityManagerWin creation.

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 266ed472c608cbe504d6dc042568dcbb10ac9a6f..65900f033fdd55c7b2b697f8dced5afa818a00bf 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -190,10 +190,6 @@ class CONTENT_EXPORT WebContentsImpl
   virtual WebUI* GetCommittedWebUI() const OVERRIDE;
   virtual void SetUserAgentOverride(const std::string& override) OVERRIDE;
   virtual const std::string& GetUserAgentOverride() const OVERRIDE;
-#if defined(OS_WIN)
-  virtual void SetParentNativeViewAccessible(
-      gfx::NativeViewAccessible accessible_parent) OVERRIDE;
-#endif
   virtual const base::string16& GetTitle() const OVERRIDE;
   virtual int32 GetMaxPageID() OVERRIDE;
   virtual int32 GetMaxPageIDForSiteInstance(
@@ -507,9 +503,6 @@ class CONTENT_EXPORT WebContentsImpl
       const blink::WebGestureEvent& event) OVERRIDE;
   virtual void DidSendScreenRects(RenderWidgetHostImpl* rwh) OVERRIDE;
   virtual void OnTouchEmulationEnabled(bool enabled) OVERRIDE;
-#if defined(OS_WIN)
-  virtual gfx::NativeViewAccessible GetParentNativeViewAccessible() OVERRIDE;
-#endif
 
   // RenderFrameHostManager::Delegate ------------------------------------------
 
@@ -917,10 +910,6 @@ class CONTENT_EXPORT WebContentsImpl
   // is closed.
   bool created_with_opener_;
 
-#if defined(OS_WIN)
-  gfx::NativeViewAccessible accessible_parent_;
-#endif
-
   // Helper classes ------------------------------------------------------------
 
   // Maps the RenderFrameHost to its media_player_cookie and PowerSaveBlocker