Enable WebViewAccessiblityTest for OOPIF webview.

content/browser/frame_host/render_frame_host_delegate.cc

 // Copyright 2013 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 <stddef.h>
 
 #include "base/callback.h"
 #include "base/strings/string16.h"
 #include "build/build_config.h"
 #include "content/browser/frame_host/render_frame_host_delegate.h"
@@ skipping 75 matching lines @@
 RenderFrameHostDelegate::GetScreenOrientationProvider() {
   return nullptr;
 }
 
 bool RenderFrameHostDelegate::ShouldRouteMessageEvent(
     RenderFrameHost* target_rfh,
     SiteInstance* source_site_instance) const {
   return false;
 }
 
+RenderFrameHost*
+RenderFrameHostDelegate::GetFocusedFrameIncludingInnerWebContents() {
+  return nullptr;
+}
+
 std::unique_ptr<WebUIImpl>
 RenderFrameHostDelegate::CreateWebUIForRenderFrameHost(const GURL& url) {
   return nullptr;
 }
 
 }  // namespace content