Use MailboxManagerSync on android.

services/gles2/gpu_state.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 "services/gles2/gpu_state.h"
 
+#include "services/gles2/mailbox_manager_factory.h"
+
 namespace gles2 {
 
 GpuState::GpuState()
     : control_thread_("gpu_command_buffer_control"),
       sync_point_manager_(gpu::SyncPointManager::Create(true)),
       share_group_(new gfx::GLShareGroup),
-      mailbox_manager_(new gpu::gles2::MailboxManagerImpl) {
+      mailbox_manager_(MailboxManagerFactory::Create()) {
   control_thread_.Start();
 }
 
 GpuState::~GpuState() {
 }
 
 }  // namespace gles2