Use MailboxManagerSync on android.

Egl fences seem to be required for proper cross-context synchronization
on android/qualcomm.

Fixes flickering seen when using surfaces composition on various
android devices (domokit/sky_engine#36).

R=jamesr@chromium.org

Review URL: https://codereview.chromium.org/1348283004 .
diff --git a/services/gles2/gpu_state.h b/services/gles2/gpu_state.h
index 1d75318..29a04f9 100644
--- a/services/gles2/gpu_state.h
+++ b/services/gles2/gpu_state.h
@@ -8,7 +8,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
-#include "gpu/command_buffer/service/mailbox_manager_impl.h"
+#include "gpu/command_buffer/service/mailbox_manager.h"
 #include "gpu/command_buffer/service/sync_point_manager.h"
 #include "ui/gl/gl_share_group.h"