Factor out dependncy on download throttling from core download code.

chrome/test/base/testing_browser_process.cc

 // 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.
 
 #include "chrome/test/base/testing_browser_process.h"
 
 #include "base/string_util.h"
 #include "chrome/browser/google/google_url_tracker.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/policy/browser_policy_connector.h"
@@ skipping 205 matching lines @@
 
 void TestingBrowserProcess::SetApplicationLocale(
     const std::string& app_locale) {
   app_locale_ = app_locale;
 }
 
 DownloadStatusUpdater* TestingBrowserProcess::download_status_updater() {
   return NULL;
 }
 
+DownloadRequestLimiter* TestingBrowserProcess::download_request_limiter() {
+  return NULL;
+}
+
 bool TestingBrowserProcess::plugin_finder_disabled() const {
   return false;
 }
 
 ChromeNetLog* TestingBrowserProcess::net_log() {
   return NULL;
 }
 
 prerender::PrerenderTracker* TestingBrowserProcess::prerender_tracker() {
   if (!prerender_tracker_.get())
@@ skipping 58 matching lines @@
   // in stages, and Windows is first. See below for more info.
   g_browser_process = NULL;
 #else
   // TODO(phajdan.jr): Temporary, for http://crbug.com/61062.
   // After the transition is over, we should just
   // reset |g_browser_process| to NULL.
   browser_process_.reset();
   g_browser_process = new TestingBrowserProcess();
 #endif
 }