Factor out dependncy on download throttling from core download code.

chrome/browser/browser_process_impl.h

 // Copyright (c) 2011 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.
 
 // When each service is created, we set a flag indicating this. At this point,
 // the service initialization could fail or succeed. This allows us to remember
 // if we tried to create a service, and not try creating it over and over if
 // the creation failed.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_
@@ skipping 79 matching lines @@
   virtual unsigned int ReleaseModule();
   virtual bool IsShuttingDown();
   virtual printing::PrintJobManager* print_job_manager();
   virtual printing::PrintPreviewTabController* print_preview_tab_controller();
   virtual printing::BackgroundPrintingManager* background_printing_manager();
   virtual GoogleURLTracker* google_url_tracker();
   virtual IntranetRedirectDetector* intranet_redirect_detector();
   virtual const std::string& GetApplicationLocale();
   virtual void SetApplicationLocale(const std::string& locale);
   virtual DownloadStatusUpdater* download_status_updater();
+  virtual DownloadRequestLimiter* download_request_limiter();
   virtual TabCloseableStateWatcher* tab_closeable_state_watcher();
   virtual BackgroundModeManager* background_mode_manager();
   virtual StatusTray* status_tray();
   virtual SafeBrowsingService* safe_browsing_service();
   virtual safe_browsing::ClientSideDetectionService*
       safe_browsing_detection_service();
   virtual bool plugin_finder_disabled() const;
 
   // NotificationObserver methods
   virtual void Observe(int type,
@@ skipping 165 matching lines @@
 
   // This service just sits around and makes thumbnails for tabs. It does
   // nothing in the constructor so we don't have to worry about lazy init.
   ThumbnailGenerator thumbnail_generator_;
 
   // Download status updates (like a changing application icon on dock/taskbar)
   // are global per-application. DownloadStatusUpdater does no work in the ctor
   // so we don't have to worry about lazy initialization.
   DownloadStatusUpdater download_status_updater_;
 
+  scoped_refptr<DownloadRequestLimiter> download_request_limiter_;
+
   // Ensures that the observers of plugin/print disable/enable state
   // notifications are properly added and removed.
   PrefChangeRegistrar pref_change_registrar_;
 
   // Lives here so can safely log events on shutdown.
   scoped_ptr<ChromeNetLog> net_log_;
 
   // Ordered before resource_dispatcher_host_delegate_ due to destruction
   // ordering.
   scoped_ptr<prerender::PrerenderTracker> prerender_tracker_;
@@ skipping 29 matching lines @@
   scoped_refptr<GpuBlacklistUpdater> gpu_blacklist_updater_;
 
 #if !defined(OS_CHROMEOS)
   scoped_ptr<ComponentUpdateService> component_updater_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(BrowserProcessImpl);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_