Revert of Migrate accessibility from RenderView to RenderFrame.

content/browser/renderer_host/render_view_host_delegate.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_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 33 matching lines @@
 class BrowserContext;
 class CrossSiteTransferringRequest;
 class FrameTree;
 class PageState;
 class RenderViewHost;
 class RenderViewHostDelegateView;
 class SessionStorageNamespace;
 class SiteInstance;
 class WebContents;
 class WebContentsImpl;
+struct AXEventNotificationDetails;
 struct FileChooserParams;
 struct GlobalRequestID;
 struct NativeWebKeyboardEvent;
 struct Referrer;
 struct RendererPreferences;
 struct WebPreferences;
 
 //
 // RenderViewHostDelegate
 //
@@ skipping 212 matching lines @@
   // Returns true if the RenderViewHost will never be visible.
   virtual bool IsNeverVisible();
 
   // Returns the FrameTree the render view should use. Guaranteed to be constant
   // for the lifetime of the render view.
   //
   // TODO(ajwong): Remove once the main frame RenderFrameHost is no longer
   // created by the RenderViewHost.
   virtual FrameTree* GetFrameTree();
 
+  // Invoked when an accessibility event is received from the renderer.
+  virtual void AccessibilityEventReceived(
+      const std::vector<AXEventNotificationDetails>& details) {}
+
  protected:
   virtual ~RenderViewHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_