Remove more unnecessary ChromeURLRequestContext members.

chrome/browser/profiles/profile_impl.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/browser/profiles/profile_impl.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/environment.h"
 #include "base/file_path.h"
@@ skipping 1500 matching lines @@
   }
   return blob_storage_context_;
 }
 
 ExtensionInfoMap* ProfileImpl::GetExtensionInfoMap() {
   return extension_info_map_.get();
 }
 
 ChromeURLDataManager* ProfileImpl::GetChromeURLDataManager() {
   if (!chrome_url_data_manager_.get())
-    chrome_url_data_manager_.reset(new ChromeURLDataManager(this));
+    chrome_url_data_manager_.reset(new ChromeURLDataManager(
+        io_data_.GetChromeURLDataManagerBackendGetter()));
   return chrome_url_data_manager_.get();
 }
 
 PromoCounter* ProfileImpl::GetInstantPromoCounter() {
 #if defined(OS_WIN)
   // TODO: enable this when we're ready to turn on the promo.
   /*
   if (!checked_instant_promo_) {
     checked_instant_promo_ = true;
     PrefService* prefs = GetPrefs();
@@ skipping 120 matching lines @@
   if (!prerender::PrerenderManager::IsPrerenderingPossible())
     return NULL;
   if (!prerender_manager_.get()) {
     CHECK(g_browser_process->prerender_tracker());
     prerender_manager_.reset(
         new prerender::PrerenderManager(
             this, g_browser_process->prerender_tracker()));
   }
   return prerender_manager_.get();
 }