Use MailboxManagerSync on android.

services/gles2/mailbox_manager_factory_nosync.cc

Index: services/gles2/mailbox_manager_factory_nosync.cc
diff --git a/services/gles2/mailbox_manager_factory_nosync.cc b/services/gles2/mailbox_manager_factory_nosync.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7611c1966938fb676ac401bd50c9b54e7b642274
--- /dev/null
+++ b/services/gles2/mailbox_manager_factory_nosync.cc
@@ -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.
+//
+
+#include "services/gles2/mailbox_manager_factory.h"
+
+#include "gpu/command_buffer/service/mailbox_manager_impl.h"
+
+namespace gles2 {
+
+gpu::gles2::MailboxManager* MailboxManagerFactory::Create() {
+  return new gpu::gles2::MailboxManagerImpl;
+}
+
+}  // namespace gles2