Add placeholder for RWHVChildFrame::CreateBrowserAccessibilityManager.

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 318 matching lines @@
 gfx::NativeViewId RenderWidgetHostViewChildFrame::GetParentForWindowlessPlugin()
     const {
   return NULL;
 }
 #endif // defined(OS_WIN)
 
 SkColorType RenderWidgetHostViewChildFrame::PreferredReadbackFormat() {
   return kN32_SkColorType;
 }
 
+BrowserAccessibilityManager*
+RenderWidgetHostViewChildFrame::CreateBrowserAccessibilityManager(
+    BrowserAccessibilityDelegate* delegate) {
+  // This eventually needs to be implemented for cross-process iframes.
+  // http://crbug.com/368298
+  return NULL;
+}
+
 }  // namespace content