Implement ResourceQueue, an object that makes it easy to delay starting

chrome/browser/renderer_host/download_throttling_resource_handler.cc

 // Copyright (c) 2006-2008 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 "chrome/browser/renderer_host/download_throttling_resource_handler.h"
 
 #include "base/logging.h"
 #include "chrome/browser/renderer_host/download_resource_handler.h"
+#include "chrome/browser/renderer_host/resource_dispatcher_host.h"
 #include "net/base/io_buffer.h"
 
 DownloadThrottlingResourceHandler::DownloadThrottlingResourceHandler(
     ResourceDispatcherHost* host,
     URLRequest* request,
     const GURL& url,
     int render_process_host_id,
     int render_view_id,
     int request_id,
     bool in_complete)
@@ skipping 139 matching lines @@
   int buf_size;
   if (download_handler_->OnWillRead(request_id_, &buffer, &buf_size,
                                     tmp_buffer_length_)) {
     CHECK(buf_size >= tmp_buffer_length_);
     memcpy(buffer->data(), tmp_buffer_->data(), tmp_buffer_length_);
     download_handler_->OnReadCompleted(request_id_, &tmp_buffer_length_);
   }
   tmp_buffer_length_ = 0;
   tmp_buffer_ = NULL;
 }