Add mojo::StrongBindingSet and use it in GeolocationServiceContext.

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 "content/browser/frame_host/render_frame_host_delegate.h"
 #include "ipc/ipc_message.h"
@@ skipping 43 matching lines @@
 AccessibilityMode RenderFrameHostDelegate::GetAccessibilityMode() const {
   return AccessibilityModeOff;
 }
 
 RenderFrameHost* RenderFrameHostDelegate::GetGuestByInstanceID(
     RenderFrameHost* render_frame_host,
     int browser_plugin_instance_id) {
   return NULL;
 }
 
-GeolocationServiceContext*
-RenderFrameHostDelegate::GetGeolocationServiceContext() {
-  return NULL;
-}
-
 WakeLockServiceContext* RenderFrameHostDelegate::GetWakeLockServiceContext() {
   return nullptr;
 }
 
 bool RenderFrameHostDelegate::ShouldRouteMessageEvent(
     RenderFrameHost* target_rfh,
     SiteInstance* source_site_instance) const {
   return false;
 }
 
 #if defined(OS_WIN)
 gfx::NativeViewAccessible
     RenderFrameHostDelegate::GetParentNativeViewAccessible() {
   return NULL;
 }
 #endif  // defined(OS_WIN)
 
 }  // namespace content