Added more strict checks for fence sync counters.

gpu/ipc/service/gpu_command_buffer_stub.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/ipc/service/gpu_command_buffer_stub.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 1015 matching lines @@
     return;
   }
 
   scoped_refptr<gl::GLImage> image = channel()->CreateImageForGpuMemoryBuffer(
       handle, size, format, internalformat);
   if (!image.get())
     return;
 
   image_manager->AddImage(image.get(), id);
   if (image_release_count) {
+    DCHECK_EQ(image_release_count,
+              sync_point_client_->client_state()->fence_sync_release() + 1);
     sync_point_client_->ReleaseFenceSync(image_release_count);
   }
 }
 
 void GpuCommandBufferStub::OnDestroyImage(int32_t id) {
   TRACE_EVENT0("gpu", "GpuCommandBufferStub::OnDestroyImage");
 
   if (!decoder_)
     return;
 
@@ skipping 87 matching lines @@
                                                     result));
 }
 
 void GpuCommandBufferStub::SendUpdateVSyncParameters(base::TimeTicks timebase,
                                                      base::TimeDelta interval) {
   Send(new GpuCommandBufferMsg_UpdateVSyncParameters(route_id_, timebase,
                                                      interval));
 }
 
 }  // namespace gpu