MailboxSync: Imply fence with sync point

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 6253cc8926112765af5d5e6094e9ae71d628564a..ea5a87788b6f96ac330d5b71c8ba2bf75823c868 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -9761,11 +9761,11 @@ error::Error GLES2DecoderImpl::HandleWaitSyncPointCHROMIUM(
     const void* cmd_data) {
   const gles2::cmds::WaitSyncPointCHROMIUM& c =
       *static_cast<const gles2::cmds::WaitSyncPointCHROMIUM*>(cmd_data);
-  group_->mailbox_manager()->PullTextureUpdates();
+  uint32 sync_point = c.sync_point;
   if (wait_sync_point_callback_.is_null())
     return error::kNoError;
 
-  return wait_sync_point_callback_.Run(c.sync_point) ?
+  return wait_sync_point_callback_.Run(sync_point) ?
       error::kNoError : error::kDeferCommandUntilLater;
 }