gpu: Reuse transfer buffers more aggresively

gpu/command_buffer/service/async_pixel_transfer_manager.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_H_
 #define GPU_COMMAND_BUFFER_SERVICE_ASYNC_PIXEL_TRANSFER_MANAGER_H_
 
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 60 matching lines @@
   virtual base::TimeDelta GetTotalTextureUploadTime() = 0;
 
   // ProcessMorePendingTransfers() will be called at a good time
   // to process a small amount of pending transfer work while
   // NeedsProcessMorePendingTransfers() returns true. Implementations
   // that can't dispatch work to separate threads should use
   // this to avoid blocking the caller thread inappropriately.
   virtual void ProcessMorePendingTransfers() = 0;
   virtual bool NeedsProcessMorePendingTransfers() = 0;
 
+  // Wait for all AsyncTex(Sub)Image2D uploads to finish before returning.
+  virtual void WaitAllAsyncTexImage2D() = 0;
+
   AsyncPixelTransferDelegate* CreatePixelTransferDelegate(
       gles2::TextureRef* ref,
       const AsyncTexImage2DParams& define_params);
 
   AsyncPixelTransferDelegate* GetPixelTransferDelegate(
       gles2::TextureRef* ref);
 
   void ClearPixelTransferDelegateForTest(gles2::TextureRef* ref);
 
   bool AsyncTransferIsInProgress(gles2::TextureRef* ref);
@@ skipping 19 matching lines @@
   virtual AsyncPixelTransferDelegate* CreatePixelTransferDelegateImpl(
       gles2::TextureRef* ref,
       const AsyncTexImage2DParams& define_params) = 0;
 
   DISALLOW_COPY_AND_ASSIGN(AsyncPixelTransferManager);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_ASYNC_PIXEL_TRANSFER_MANAGER_H_