Scope and clean up uses of AccessibilityMode.

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 45 matching lines @@
              << "Not supported.";
   return false;
 }
 
 std::string RenderFrameHostDelegate::GetDefaultMediaDeviceID(
     MediaStreamType type) {
   return std::string();
 }
 
 AccessibilityMode RenderFrameHostDelegate::GetAccessibilityMode() const {
-  return AccessibilityModeOff;
+  return AccessibilityMode();
 }
 
 RenderFrameHost* RenderFrameHostDelegate::GetGuestByInstanceID(
     RenderFrameHost* render_frame_host,
     int browser_plugin_instance_id) {
   return NULL;
 }
 
 device::GeolocationServiceContext*
 RenderFrameHostDelegate::GetGeolocationServiceContext() {
@@ skipping 25 matching lines @@
 }
 
 #if defined(OS_ANDROID)
 base::android::ScopedJavaLocalRef<jobject>
 RenderFrameHostDelegate::GetJavaRenderFrameHostDelegate() {
   return nullptr;
 }
 #endif
 
 }  // namespace content