Send accessibility notifications to the frame client, not view client.

public/web/WebFrameClient.h

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebFrameClient_h
 #define WebFrameClient_h
 
 #include "../platform/WebColor.h"
+#include "WebAXObject.h"
 #include "WebDOMMessageEvent.h"
 #include "WebDataSource.h"
 #include "WebFrame.h"
 #include "WebHistoryCommitType.h"
 #include "WebHistoryItem.h"
 #include "WebIconURL.h"
 #include "WebNavigationPolicy.h"
 #include "WebNavigationType.h"
 #include "WebSecurityOrigin.h"
 #include "WebTextDirection.h"
@@ skipping 502 matching lines @@
 
     // Send initial drawing parameters to a child frame that is being rendered out of process.
     virtual void initializeChildFrame(const WebRect& frameRect, float scaleFactor) { }
 
 
     // Screen Orientation --------------------------------------------------
 
     // Access the embedder API for (client-based) screen orientation client .
     virtual WebScreenOrientationClient* webScreenOrientationClient() { return 0; }
 
+    // Accessibility -------------------------------------------------------
+
+    // Notifies embedder about an accessibility event.
+    virtual void postAccessibilityEvent(const WebAXObject&, WebAXEvent) { }
+
 protected:
     virtual ~WebFrameClient() { }
 };
 
 } // namespace blink
 
 #endif