Fix race in BrowserAccessibilityManagerWin creation.

content/browser/frame_host/render_widget_host_view_child_frame.cc

 // Copyright 2014 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.
 
 #include "content/browser/frame_host/render_widget_host_view_child_frame.h"
 
 #include "content/browser/frame_host/cross_process_frame_connector.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/common/view_messages.h"
@@ skipping 311 matching lines @@
 
 gfx::GLSurfaceHandle RenderWidgetHostViewChildFrame::GetCompositingSurface() {
   return gfx::GLSurfaceHandle(gfx::kNullPluginWindow, gfx::TEXTURE_TRANSPORT);
 }
 
 void RenderWidgetHostViewChildFrame::SetScrollOffsetPinning(
     bool is_pinned_to_left, bool is_pinned_to_right) {
 }
 
 #if defined(OS_WIN)
-void RenderWidgetHostViewChildFrame::SetParentNativeViewAccessible(
-    gfx::NativeViewAccessible accessible_parent) {
+HWND RenderWidgetHostViewChildFrame::GetAccessibleParentHWND() const {
+  return NULL;
+}
+
+IAccessible* RenderWidgetHostViewChildFrame::GetParentIAccessible() const {
+  return NULL;
 }
 
 gfx::NativeViewId RenderWidgetHostViewChildFrame::GetParentForWindowlessPlugin()
     const {
   return NULL;
 }
 #endif // defined(OS_WIN)
 
 SkBitmap::Config RenderWidgetHostViewChildFrame::PreferredReadbackFormat() {
   return SkBitmap::kARGB_8888_Config;
 }
 
 }  // namespace content