Convert a bunch of resource IPCs to be control messages. They didn't need to be routed.

content/browser/loader/async_resource_handler.h

 // 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.
 
 #ifndef CONTENT_BROWSER_LOADER_ASYNC_RESOURCE_HANDLER_H_
 #define CONTENT_BROWSER_LOADER_ASYNC_RESOURCE_HANDLER_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 10 matching lines @@
 class ResourceDispatcherHostImpl;
 class ResourceMessageFilter;
 class SharedIOBuffer;
 
 // Used to complete an asynchronous resource request in response to resource
 // load events from the resource dispatcher host.
 class AsyncResourceHandler : public ResourceHandler,
                              public ResourceMessageDelegate {
  public:
   AsyncResourceHandler(ResourceMessageFilter* filter,
-                       int routing_id,
                        net::URLRequest* request,
                        ResourceDispatcherHostImpl* rdh);
   virtual ~AsyncResourceHandler();
 
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  bool* message_was_ok) OVERRIDE;
 
   // ResourceHandler implementation:
   virtual bool OnUploadProgress(int request_id,
                                 uint64 position,
@@ skipping 26 matching lines @@
   void OnFollowRedirect(int request_id,
                         bool has_new_first_party_for_cookies,
                         const GURL& new_first_party_for_cookies);
   void OnDataReceivedACK(int request_id);
 
   bool EnsureResourceBufferIsInitialized();
   void ResumeIfDeferred();
 
   scoped_refptr<ResourceBuffer> buffer_;
   scoped_refptr<ResourceMessageFilter> filter_;
-  int routing_id_;
   net::URLRequest* request_;
   ResourceDispatcherHostImpl* rdh_;
 
   // Number of messages we've sent to the renderer that we haven't gotten an
   // ACK for. This allows us to avoid having too many messages in flight.
   int pending_data_count_;
 
   int allocation_size_;
 
   bool did_defer_;
 
   bool has_checked_for_sufficient_resources_;
   bool sent_received_response_msg_;
   bool sent_first_data_msg_;
 
   DISALLOW_COPY_AND_ASSIGN(AsyncResourceHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_ASYNC_RESOURCE_HANDLER_H_