Remove all remaining traces of MessageLoopProxy.

chrome/browser/renderer_host/safe_browsing_resource_throttle.cc

 // Copyright (c) 2012 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/renderer_host/safe_browsing_resource_throttle.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 242 matching lines @@
   SafeBrowsingUIManager::UnsafeResource resource;
   resource.url = url;
   resource.original_url = request_->original_url();
   resource.redirect_urls = redirect_urls_;
   resource.is_subresource = resource_type_ != content::RESOURCE_TYPE_MAIN_FRAME;
   resource.is_subframe = resource_type_ == content::RESOURCE_TYPE_SUB_FRAME;
   resource.threat_type = threat_type;
   resource.threat_metadata = metadata;
   resource.callback = base::Bind(
       &SafeBrowsingResourceThrottle::OnBlockingPageComplete, AsWeakPtr());
-  resource.callback_thread =
-      content::BrowserThread::GetMessageLoopProxyForThread(
-          content::BrowserThread::IO);
+  resource.callback_thread = content::BrowserThread::GetTaskRunnerForThread(
+      content::BrowserThread::IO);
   resource.render_process_host_id = info->GetChildID();
   resource.render_frame_id = info->GetRenderFrameID();
   resource.threat_source = database_manager_->GetThreatSource();
 
   state_ = STATE_DISPLAYING_BLOCKING_PAGE;
 
   content::BrowserThread::PostTask(
       content::BrowserThread::UI,
       FROM_HERE,
       base::Bind(&SafeBrowsingResourceThrottle::StartDisplayingBlockingPage,
@@ skipping 118 matching lines @@
                        unchecked_redirect_url_, "defer_reason",
                        "resumed_redirect");
     }
   }
 
   if (resume) {
     defer_state_ = DEFERRED_NONE;
     controller()->Resume();
   }
 }