Refactor the guts of ResourceDispatcherHostImpl into a new class named

content/browser/download/download_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/download/download_resource_handler.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 394 matching lines @@
   if (!was_deferred_)
     return;
   if (pause_count_ > 0)
     return;
 
   was_deferred_ = false;
   if (!last_stream_pause_time_.is_null()) {
     total_pause_time_ += (base::TimeTicks::Now() - last_stream_pause_time_);
     last_stream_pause_time_ = base::TimeTicks();
   }
-  ResourceDispatcherHostImpl::Get()->ResumeDeferredRequest(
-      global_id_.child_id,
-      global_id_.request_id);
+
+  controller()->Resume();
 }
 
 void DownloadResourceHandler::CancelRequest() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   ResourceDispatcherHostImpl::Get()->CancelRequest(
       global_id_.child_id,
       global_id_.request_id,
       false);
 }
@@ skipping 25 matching lines @@
   // false somewhere in the chain of resource handlers.
   CallStartedCB(DownloadId(), net::ERR_ACCESS_DENIED);
 
   // Remove output stream callback if a stream exists.
   if (stream_writer_.get())
     stream_writer_->RegisterCallback(base::Closure());
 
   UMA_HISTOGRAM_TIMES("SB2.DownloadDuration",
                       base::TimeTicks::Now() - download_start_time_);
 }
-