MailboxSync: Imply fence with sync point

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 2012 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 "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 9728 matching lines @@
     uint32 immediate_data_size,
     const void* cmd_data) {
   return error::kUnknownCommand;
 }
 
 error::Error GLES2DecoderImpl::HandleWaitSyncPointCHROMIUM(
     uint32 immediate_data_size,
     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;
 }
 
 error::Error GLES2DecoderImpl::HandleDiscardBackbufferCHROMIUM(
     uint32 immediate_data_size,
     const void* cmd_data) {
   if (surface_->DeferDraws())
     return error::kDeferCommandUntilLater;
   if (!surface_->SetBackbufferAllocation(false))
     return error::kLostContext;
@@ skipping 1464 matching lines @@
   }
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu