Add synthetic delay points for latency testing

gpu/command_buffer/service/async_pixel_transfer_manager_egl.h

 // Copyright 2013 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_ASYNC_PIXEL_TRANSFER_MANAGER_EGL_H_
 #define GPU_COMMAND_BUFFER_SERVICE_ASYNC_PIXEL_TRANSFER_MANAGER_EGL_H_
 
 #include "gpu/command_buffer/service/async_pixel_transfer_manager.h"
+#include "base/atomic_ref_count.h"
 
 #include "base/memory/ref_counted.h"
 
 namespace gpu {
 class AsyncPixelTransferDelegateEGL;
 class AsyncPixelTransferUploadStats;
 
 class AsyncPixelTransferManagerEGL : public AsyncPixelTransferManager {
  public:
   AsyncPixelTransferManagerEGL();
@@ skipping 13 matching lines @@
   struct SharedState {
     SharedState();
     ~SharedState();
 
     scoped_refptr<AsyncPixelTransferUploadStats> texture_upload_stats;
     bool is_imagination;
     bool is_qualcomm;
     typedef std::list<base::WeakPtr<AsyncPixelTransferDelegateEGL> >
         TransferQueue;
     TransferQueue pending_allocations;
+    base::AtomicRefCount pending_uploads;
   };
 
  private:
   // AsyncPixelTransferManager implementation:
   virtual AsyncPixelTransferDelegate* CreatePixelTransferDelegateImpl(
       gles2::TextureRef* ref,
       const AsyncTexImage2DParams& define_params) OVERRIDE;
 
   SharedState shared_state_;
 
   DISALLOW_COPY_AND_ASSIGN(AsyncPixelTransferManagerEGL);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_ASYNC_PIXEL_TRANSFER_MANAGER_EGL_H_