Move creation and ownership of HostZoomMap to content instead of having every embedder do this.

content/browser/mock_resource_context.cc

 // Copyright (c) 2012 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/mock_resource_context.h"
 
 #include "net/url_request/url_request_test_util.h"
 
 namespace content {
 
@@ skipping 14 matching lines @@
 MockResourceContext::~MockResourceContext() {}
 
 net::HostResolver* MockResourceContext::GetHostResolver()  {
   return NULL;
 }
 
 net::URLRequestContext* MockResourceContext::GetRequestContext()  {
   return test_request_context_;
 }
 
-HostZoomMap* MockResourceContext::GetHostZoomMap()  {
-  return NULL;
-}
-
 MediaObserver* MockResourceContext::GetMediaObserver()  {
   return media_observer_;
 }
 
 media_stream::MediaStreamManager*
     MockResourceContext::GetMediaStreamManager() {
   return media_stream_manager_;
 }
 
 AudioManager* MockResourceContext::GetAudioManager() {
   return audio_manager_;
 }
 
 }  // namespace content