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

shell/android/library_loader.cc

 // Copyright 2013 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 "base/android/base_jni_onload.h"
 #include "base/android/base_jni_registrar.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "base/bind.h"
 #include "mojo/android/system/base_run_loop.h"
 #include "mojo/android/system/core_impl.h"
 #include "services/native_viewport/platform_viewport_android.h"
 #include "shell/android/android_handler.h"
 #include "shell/android/java_application_loader.h"
 #include "shell/android/main.h"
+#include "shell/android/native_handler_thread.h"
 
 namespace {
 
 base::android::RegistrationMethod kMojoRegisteredMethods[] = {
     {"Base", base::android::RegisterJni},
     {"Core", mojo::android::RegisterCoreImpl},
     {"BaseRunLoop", mojo::android::RegisterBaseRunLoop},
     {"AndroidHandler", shell::RegisterAndroidHandlerJni},
+    {"JavaApplicationLoader", shell::JavaApplicationLoader::RegisterJni},
+    {"NativeHandlerThread", shell::RegisterNativeHandlerThreadJni},
     {"PlatformViewportAndroid",
      native_viewport::PlatformViewportAndroid::Register},
     {"ShellService", shell::RegisterShellService},
-    {"JavaApplicationLoader", shell::JavaApplicationLoader::RegisterJni},
 };
 
 bool RegisterJNI(JNIEnv* env) {
   return RegisterNativeMethods(env, kMojoRegisteredMethods,
                                arraysize(kMojoRegisteredMethods));
 }
 
 }  // namespace
 
 // This is called by the VM when the shared library is first loaded.
 JNI_EXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
   std::vector<base::android::RegisterCallback> register_callbacks;
   register_callbacks.push_back(base::Bind(&RegisterJNI));
   if (!base::android::OnJNIOnLoadRegisterJNI(vm, register_callbacks) ||
       !base::android::OnJNIOnLoadInit(
           std::vector<base::android::InitCallback>())) {
     return -1;
   }
 
   return JNI_VERSION_1_4;
 }