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

content/browser/renderer_host/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/renderer_host/async_resource_handler.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/debug/alias.h"
 #include "base/hash_tables.h"
 #include "base/logging.h"
 #include "base/shared_memory.h"
 #include "content/browser/debugger/devtools_netlog_observer.h"
 #include "content/browser/host_zoom_map_impl.h"
 #include "content/browser/renderer_host/resource_dispatcher_host.h"
 #include "content/browser/renderer_host/resource_dispatcher_host_request_info.h"
 #include "content/browser/renderer_host/resource_message_filter.h"
+#include "content/browser/resource_context_impl.h"
 #include "content/common/resource_messages.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/global_request_id.h"
-#include "content/public/browser/resource_context.h"
 #include "content/public/browser/resource_dispatcher_host_delegate.h"
 #include "content/public/common/resource_response.h"
 #include "net/base/io_buffer.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_log.h"
 #include "webkit/glue/resource_loader_bridge.h"
 
 using base::TimeTicks;
 using content::GlobalRequestID;
+using content::HostZoomMap;
 
 namespace {
 
 // When reading, we don't know if we are going to get EOF (0 bytes read), so
 // we typically have a buffer that we allocated but did not use.  We keep
 // this buffer around for the next read as a small optimization.
 SharedIOBuffer* g_spare_read_buffer = NULL;
 
 // The initial size of the shared memory buffer. (32 kilobytes).
 const int kInitialReadBufSize = 32768;
@@ skipping 85 matching lines @@
   // or of having to layout the new content twice.
   net::URLRequest* request = rdh_->GetURLRequest(
       GlobalRequestID(filter_->child_id(), request_id));
 
   if (rdh_->delegate())
     rdh_->delegate()->OnResponseStarted(request, response, filter_);
 
   DevToolsNetLogObserver::PopulateResponseInfo(request, response);
 
   content::ResourceContext* resource_context = filter_->resource_context();
-  content::HostZoomMap* host_zoom_map = resource_context->GetHostZoomMap();
+  content::HostZoomMap* host_zoom_map =
+      content::GetHostZoomMapForResourceContext(resource_context);
 
   ResourceDispatcherHostRequestInfo* info = rdh_->InfoForRequest(request);
   if (info->resource_type() == ResourceType::MAIN_FRAME && host_zoom_map) {
     GURL request_url(request->url());
     filter_->Send(new ViewMsg_SetZoomLevelForLoadingURL(
         info->route_id(),
         request_url, host_zoom_map->GetZoomLevel(net::GetHostOrSpecFromURL(
             request_url))));
   }
 
@@ skipping 128 matching lines @@
 
 // static
 void AsyncResourceHandler::GlobalCleanup() {
   if (g_spare_read_buffer) {
     // Avoid the CHECK in SharedIOBuffer::~SharedIOBuffer().
     SharedIOBuffer* tmp = g_spare_read_buffer;
     g_spare_read_buffer = NULL;
     tmp->Release();
   }
 }