Move download stuff from download helper back to TabContents. This is basically a revert of r8576...

chrome/browser/browser_process.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.
 
 // This interface is for managing the global services of the application. Each
 // service is lazily created when requested the first time. The service getters
 // will return NULL if the service is not available, so callers must check for
 // this condition.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_H_
@@ skipping 161 matching lines @@
   virtual printing::BackgroundPrintingManager*
       background_printing_manager() = 0;
 
   virtual GoogleURLTracker* google_url_tracker() = 0;
   virtual IntranetRedirectDetector* intranet_redirect_detector() = 0;
 
   // Returns the locale used by the application.
   virtual const std::string& GetApplicationLocale() = 0;
   virtual void SetApplicationLocale(const std::string& locale) = 0;
 
-  DownloadRequestLimiter* download_request_limiter();
   virtual DownloadStatusUpdater* download_status_updater() = 0;
 
   // Returns a reference to the user-data-dir based profiles vector.
   std::vector<std::wstring>& user_data_dir_profiles() {
     return user_data_dir_profiles_;
   }
 
   // Returns the object that watches for changes in the closeable state of tab.
   virtual TabCloseableStateWatcher* tab_closeable_state_watcher() = 0;
 
@@ skipping 55 matching lines @@
 
   // Used for testing plugin data removal at shutdown.
   std::string plugin_data_remover_mime_type_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserProcess);
 };
 
 extern BrowserProcess* g_browser_process;
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_H_