Revert of [mojo] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

mojo/runner/in_process_native_runner.cc

 // Copyright 2014 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 "mojo/runner/in_process_native_runner.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
-#include "base/thread_task_runner_handle.h"
+#include "base/message_loop/message_loop_proxy.h"
 #include "base/threading/platform_thread.h"
 #include "mojo/runner/native_application_support.h"
 
 namespace mojo {
 namespace runner {
 
 InProcessNativeRunner::InProcessNativeRunner(Context* context)
     : cleanup_(shell::NativeApplicationCleanup::DONT_DELETE),
       app_library_(nullptr) {
 }
@@ skipping 15 matching lines @@
     InterfaceRequest<Application> application_request,
     const base::Closure& app_completed_callback) {
   app_path_ = app_path;
   cleanup_ = cleanup;
 
   DCHECK(!application_request_.is_pending());
   application_request_ = application_request.Pass();
 
   DCHECK(app_completed_callback_runner_.is_null());
   app_completed_callback_runner_ =
-      base::Bind(&base::TaskRunner::PostTask,
-                 base::ThreadTaskRunnerHandle::Get(),
-                 FROM_HERE,
-                 app_completed_callback);
+      base::Bind(&base::TaskRunner::PostTask, base::MessageLoopProxy::current(),
+                 FROM_HERE, app_completed_callback);
 
   DCHECK(!thread_);
   thread_.reset(new base::DelegateSimpleThread(this, "app_thread"));
   thread_->Start();
 }
 
 void InProcessNativeRunner::Run() {
   DVLOG(2) << "Loading/running Mojo app in process from library: "
            << app_path_.value()
            << " thread id=" << base::PlatformThread::CurrentId();
 
   // TODO(vtl): ScopedNativeLibrary doesn't have a .get() method!
   base::NativeLibrary app_library = LoadNativeApplication(app_path_, cleanup_);
   app_library_.Reset(app_library);
   RunNativeApplication(app_library, application_request_.Pass());
   app_completed_callback_runner_.Run();
   app_completed_callback_runner_.Reset();
 }
 
 scoped_ptr<shell::NativeRunner> InProcessNativeRunnerFactory::Create(
     const Options& options) {
   return make_scoped_ptr(new InProcessNativeRunner(context_));
 }
 
 }  // namespace runner
 }  // namespace mojo