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

shell/android/native_handler_thread.h

Index: shell/android/native_handler_thread.h
diff --git a/shell/android/native_handler_thread.h b/shell/android/native_handler_thread.h
new file mode 100644
index 0000000000000000000000000000000000000000..a953a9c18965c1691b077a015f1339b03003a94c
--- /dev/null
+++ b/shell/android/native_handler_thread.h
@@ -0,0 +1,16 @@
+// 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.
+
+#ifndef SHELL_ANDROID_NATIVE_HANDLER_THREAD_H_
+#define SHELL_ANDROID_NATIVE_HANDLER_THREAD_H_
+
+#include <jni.h>
+
+namespace shell {
+
+bool RegisterNativeHandlerThreadJni(JNIEnv* env);
+
+}  // namespace shell
+
+#endif  // SHELL_ANDROID_NATIVE_HANDLER_THREAD_H_