gpu: Add the ability to wait on upload completion.

ui/gl/async_pixel_transfer_delegate_stub.h

 // 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.
 
 #ifndef UI_GL_ASYNC_TASK_DELEGATE_STUB_H_
 #define UI_GL_ASYNC_TASK_DELEGATE_STUB_H_
 
 #include "ui/gl/async_pixel_transfer_delegate.h"
 
 namespace gfx {
@@ skipping 29 matching lines @@
       const AsyncMemoryParams& mem_params,
       const CompletionCallback& callback) OVERRIDE;
   virtual void AsyncTexImage2D(
       AsyncPixelTransferState* transfer_state,
       const AsyncTexImage2DParams& tex_params,
       const AsyncMemoryParams& mem_params) OVERRIDE;
   virtual void AsyncTexSubImage2D(
       AsyncPixelTransferState* transfer_state,
       const AsyncTexSubImage2DParams& tex_params,
       const AsyncMemoryParams& mem_params) OVERRIDE;
+  virtual void WaitForTransferCompletion(
+      AsyncPixelTransferState* state) OVERRIDE;
   virtual uint32 GetTextureUploadCount() OVERRIDE;
   virtual base::TimeDelta GetTotalTextureUploadTime() OVERRIDE;
  private:
   // implement AsyncPixelTransferDelegate:
   virtual AsyncPixelTransferState*
       CreateRawPixelTransferState(GLuint texture_id) OVERRIDE;
 
   int texture_upload_count_;
   base::TimeDelta total_texture_upload_time_;
 
   DISALLOW_COPY_AND_ASSIGN(AsyncPixelTransferDelegateStub);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_ASYNC_TASK_DELEGATE_ANDROID_H_