Remove all remaining traces of MessageLoopProxy.

extensions/browser/api/declarative/declarative_api.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 "extensions/browser/api/declarative/declarative_api.h"
 
 #include <stddef.h>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 138 matching lines @@
   DCHECK(rules_registry_.get());
   // Raw access to this function is not available to extensions, therefore
   // there should never be a request for a nonexisting rules registry.
   EXTENSION_FUNCTION_VALIDATE(rules_registry_.get());
 
   if (content::BrowserThread::CurrentlyOn(rules_registry_->owner_thread())) {
     bool success = RunAsyncOnCorrectThread();
     SendResponse(success);
   } else {
     scoped_refptr<base::SingleThreadTaskRunner> thread_task_runner =
-        content::BrowserThread::GetMessageLoopProxyForThread(
+        content::BrowserThread::GetTaskRunnerForThread(
             rules_registry_->owner_thread());
     base::PostTaskAndReplyWithResult(
         thread_task_runner.get(), FROM_HERE,
         base::Bind(&RulesFunction::RunAsyncOnCorrectThread, this),
         base::Bind(&RulesFunction::SendResponse, this));
   }
 
   return true;
 }
 
@@ skipping 49 matching lines @@
 
   std::unique_ptr<base::ListValue> rules_value(new base::ListValue());
   for (const auto& rule : rules)
     rules_value->Append(rule->ToValue());
   SetResult(std::move(rules_value));
 
   return true;
 }
 
 }  // namespace extensions