[extensions] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

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 "base/base64.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+#include "base/single_thread_task_runner.h"
 #include "base/task_runner_util.h"
 #include "base/values.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/api/declarative/rules_registry_service.h"
 #include "extensions/browser/api/extensions_api_client.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/guest_view/web_view/web_view_constants.h"
@@ skipping 125 matching lines @@
       GetRulesRegistry(rules_registry_id, event_name);
   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::MessageLoopProxy> message_loop_proxy =
+    scoped_refptr<base::SingleThreadTaskRunner> thread_task_runner =
         content::BrowserThread::GetMessageLoopProxyForThread(
             rules_registry_->owner_thread());
     base::PostTaskAndReplyWithResult(
-        message_loop_proxy.get(),
-        FROM_HERE,
+        thread_task_runner.get(), FROM_HERE,
         base::Bind(&RulesFunction::RunAsyncOnCorrectThread, this),
         base::Bind(&RulesFunction::SendResponse, this));
   }
 
   return true;
 }
 
 bool EventsEventAddRulesFunction::RunAsyncOnCorrectThread() {
   ConvertBinaryListElementsToBase64(args_.get());
   scoped_ptr<AddRules::Params> params(AddRules::Params::Create(*args_));
@@ skipping 32 matching lines @@
   } else {
     rules_registry_->GetAllRules(extension_id(), &rules);
   }
 
   results_ = GetRules::Results::Create(rules);
 
   return true;
 }
 
 }  // namespace extensions