Use thread with looper and native message loop for vsync service.

shell/android/native_handler_thread.cc

+// Copyright 2015 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 "shell/android/native_handler_thread.h"
+
+#include "base/message_loop/message_loop.h"
+#include "jni/NativeHandlerThread_jni.h"
+
+namespace shell {
+
+jlong CreateMessageLoop(JNIEnv* env, jobject jcaller) {
+  scoped_ptr<base::MessageLoop> loop(new base::MessageLoopForUI);
+  base::MessageLoopForUI::current()->Start();
+  return reinterpret_cast<intptr_t>(loop.release());
+}
+
+void DeleteMessageLoop(JNIEnv* env, jobject jcaller, jlong message_loop) {
+  scoped_ptr<base::MessageLoop> loop(
+      reinterpret_cast<base::MessageLoop*>(message_loop));
+  loop->QuitNow();
+}
+
+bool RegisterNativeHandlerThreadJni(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace shell