Add FrameHost mojo service

content/browser/loader/async_resource_handler.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/loader/async_resource_handler.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/containers/hash_tables.h"
 #include "base/debug/alias.h"
 #include "base/feature_list.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/shared_memory.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
-#include "content/browser/host_zoom_map_impl.h"
 #include "content/browser/loader/netlog_observer.h"
 #include "content/browser/loader/resource_buffer.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/browser/loader/resource_message_filter.h"
 #include "content/browser/loader/resource_request_info_impl.h"
 #include "content/browser/resource_context_impl.h"
 #include "content/common/resource_messages.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/resource_dispatcher_host_delegate.h"
 #include "content/public/common/content_features.h"
@@ skipping 306 matching lines @@
     ReportUploadProgress();
   }
 
   if (rdh_->delegate()) {
     rdh_->delegate()->OnResponseStarted(
         request(), info->GetContext(), response, info->filter());
   }
 
   NetLogObserver::PopulateResponseInfo(request(), response);
 
-  const HostZoomMapImpl* host_zoom_map =

[wjmaclean, 2016/05/16 18:53:07]

If I remember correctly, this is the only consumer for
ResourceMessageFilter::GetHostZoomMap(), so you should trace back through that
code dependency and remove it. 

[scottmg, 2016/05/16 22:54:56]

Done.

-      static_cast<const HostZoomMapImpl*>(info->filter()->GetHostZoomMap());
-
-  if (info->GetResourceType() == RESOURCE_TYPE_MAIN_FRAME && host_zoom_map) {
-    const GURL& request_url = request()->url();
-    int render_process_id = info->GetChildID();
-    int render_view_id = info->GetRouteID();
-
-    double zoom_level = host_zoom_map->GetZoomLevelForView(
-        request_url, render_process_id, render_view_id);
-
-    info->filter()->Send(new ViewMsg_SetZoomLevelForLoadingURL(
-        render_view_id, request_url, zoom_level));
-  }
-
   // If the parent handler downloaded the resource to a file, grant the child
   // read permissions on it.
   if (!response->head.download_file_path.empty()) {
     rdh_->RegisterDownloadedTempFile(
         info->GetChildID(), info->GetRequestID(),
         response->head.download_file_path);
   }
 
   response->head.request_start = request()->creation_time();
   response->head.response_start = TimeTicks::Now();
@@ skipping 229 matching lines @@
   } else {
     UMA_HISTOGRAM_CUSTOM_COUNTS(
         "Net.ResourceLoader.ResponseStartToEnd.Over_512kB",
         elapsed_time, 1, 100000, 100);
   }
 
   inlining_helper_->RecordHistogram(elapsed_time);
 }
 
 }  // namespace content