Reduce the amount of included header files. Vast change like in "Oh God! This...

chrome/browser/renderer_host/download_throttling_resource_handler.h

 // 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.
 
 #ifndef CHROME_BROWSER_RENDERER_HOST_DOWNLOAD_THROTTLING_RESOURCE_HANDLER_H_
 #define CHROME_BROWSER_RENDERER_HOST_DOWNLOAD_THROTTLING_RESOURCE_HANDLER_H_
 
 #include <string>
 
 #include "chrome/browser/renderer_host/resource_handler.h"
 #include "googleurl/src/gurl.h"
 
 #if defined(OS_WIN)
 // TODO(port): Remove ifdef when downloads are ported.
 #include "chrome/browser/download/download_request_manager.h"
 #elif defined(OS_POSIX)
 #include "chrome/common/temp_scaffolding_stubs.h"
 #endif
 
 class DownloadResourceHandler;
 class ResourceDispatcherHost;
+class URLRequest;
 
 // DownloadThrottlingResourceHandler is used to determine if a download should
 // be allowed. When a DownloadThrottlingResourceHandler is created it pauses the
 // download and asks the DownloadRequestManager if the download should be
 // allowed. The DownloadRequestManager notifies us asynchronously as to whether
 // the download is allowed or not. If the download is allowed the request is
 // resumed, a DownloadResourceHandler is created and all EventHandler methods
 // are delegated to it. If the download is not allowed the request is canceled.
 
 class DownloadThrottlingResourceHandler
@@ skipping 51 matching lines @@
   // If true the next call to OnReadCompleted is ignored. This is used if we're
   // paused during a call to OnReadCompleted. Pausing during OnReadCompleted
   // results in two calls to OnReadCompleted for the same data. This make sure
   // we ignore one of them.
   bool ignore_on_read_complete_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadThrottlingResourceHandler);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_DOWNLOAD_THROTTLING_RESOURCE_HANDLER_H_