gpu: Reuse transfer buffers more aggresively

gpu/command_buffer/service/async_pixel_transfer_manager_idle.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_IDLE_H_
 #define GPU_COMMAND_BUFFER_SERVICE_ASYNC_PIXEL_TRANSFER_MANAGER_IDLE_H_
 
 #include <list>
 
 #include "gpu/command_buffer/service/async_pixel_transfer_manager.h"
 
 namespace gpu {
 
 class AsyncPixelTransferManagerIdle : public AsyncPixelTransferManager {
  public:
   AsyncPixelTransferManagerIdle();
   virtual ~AsyncPixelTransferManagerIdle();
 
   // AsyncPixelTransferManager implementation:
   virtual void BindCompletedAsyncTransfers() OVERRIDE;
   virtual void AsyncNotifyCompletion(
       const AsyncMemoryParams& mem_params,
       AsyncPixelTransferCompletionObserver* observer) OVERRIDE;
   virtual uint32 GetTextureUploadCount() OVERRIDE;
   virtual base::TimeDelta GetTotalTextureUploadTime() OVERRIDE;
   virtual void ProcessMorePendingTransfers() OVERRIDE;
   virtual bool NeedsProcessMorePendingTransfers() OVERRIDE;
+  virtual void WaitAllAsyncTexImage2D() OVERRIDE;
 
   struct Task {
-    Task(uint64 transfer_id, const base::Closure& task);
+    Task(uint64 transfer_id,
+         AsyncPixelTransferDelegate* delegate,
+         const base::Closure& task);
     ~Task();
 
     // This is non-zero if pixel transfer task.
     uint64 transfer_id;
 
+    AsyncPixelTransferDelegate* delegate;
+
     base::Closure task;
   };
 
   // State shared between Managers and Delegates.
   struct SharedState {
     SharedState();
     ~SharedState();
     void ProcessNotificationTasks();
 
     int texture_upload_count;
     base::TimeDelta total_texture_upload_time;
     std::list<Task> tasks;
   };
 
  private:
   // AsyncPixelTransferManager implementation:
   virtual AsyncPixelTransferDelegate* CreatePixelTransferDelegateImpl(
       gles2::TextureRef* ref,
       const AsyncTexImage2DParams& define_params) OVERRIDE;
 
   SharedState shared_state_;
 
   DISALLOW_COPY_AND_ASSIGN(AsyncPixelTransferManagerIdle);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_ASYNC_PIXEL_TRANSFER_MANAGER_IDLE_H_