List sync points to wait on in AsyncFlush message

gpu/command_buffer/service/sync_point_manager.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/sync_point_manager.h"
 
 #include <climits>
 
 #include "base/logging.h"
 #include "base/rand_util.h"
@@ skipping 63 matching lines @@
 
 bool SyncPointManager::IsSyncPointRetired(uint32 sync_point) {
   DCHECK(thread_checker_.CalledOnValidThread());
   {
     base::AutoLock lock(lock_);
     SyncPointMap::iterator it = sync_point_map_.find(sync_point);
     return it == sync_point_map_.end();
   }
 }
 
+bool SyncPointManager::WasSyncPointGenerated(uint32 sync_point) {
+  base::AutoLock lock(lock_);
+
+  return next_sync_point_ - 1 - sync_point < 0x80000000;
+}
+
 }  // namespace gpu