Use MailboxManagerSync on android.

services/gles2/command_buffer_impl.cc

Index: services/gles2/command_buffer_impl.cc
diff --git a/services/gles2/command_buffer_impl.cc b/services/gles2/command_buffer_impl.cc
index 72a27d075c22e0b42aa1cee19b014c050d4003a1..f999c8e1bedb0e27d0cb8bc2e6c9b7394b2614d7 100644
--- a/services/gles2/command_buffer_impl.cc
+++ b/services/gles2/command_buffer_impl.cc
@@ -124,15 +124,15 @@ void CommandBufferImpl::InsertSyncPoint(bool retire) {
   sync_point_client_->DidInsertSyncPoint(sync_point);
   if (retire) {
     driver_task_runner_->PostTask(
-        FROM_HERE, base::Bind(&gpu::SyncPointManager::RetireSyncPoint,
-                              sync_point_manager_, sync_point));
+        FROM_HERE, base::Bind(&CommandBufferDriver::RetireSyncPointOnGpuThread,
+                              base::Unretained(driver_.get()), sync_point));
   }
 }
 
 void CommandBufferImpl::RetireSyncPoint(uint32_t sync_point) {
   driver_task_runner_->PostTask(
-      FROM_HERE, base::Bind(&gpu::SyncPointManager::RetireSyncPoint,
-                            sync_point_manager_, sync_point));
+      FROM_HERE, base::Bind(&CommandBufferDriver::RetireSyncPointOnGpuThread,
+                            base::Unretained(driver_.get()), sync_point));
 }
 
 void CommandBufferImpl::Echo(const mojo::Callback<void()>& callback) {