Revert of Move AW renderer compositor context to gpu thread

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:
-  explicit AsyncPixelTransferManagerIdle(
-      bool use_teximage2d_over_texsubimage2d);
+  AsyncPixelTransferManagerIdle();
   ~AsyncPixelTransferManagerIdle() override;
 
   // AsyncPixelTransferManager implementation:
   void BindCompletedAsyncTransfers() override;
   void AsyncNotifyCompletion(
       const AsyncMemoryParams& mem_params,
       AsyncPixelTransferCompletionObserver* observer) override;
   uint32 GetTextureUploadCount() override;
   base::TimeDelta GetTotalTextureUploadTime() override;
   void ProcessMorePendingTransfers() override;
   bool NeedsProcessMorePendingTransfers() override;
   void WaitAllAsyncTexImage2D() override;
 
   struct 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 {
-    explicit SharedState(bool use_teximage2d_over_texsubimage2d);
+    SharedState();
     ~SharedState();
     void ProcessNotificationTasks();
 
-    const bool use_teximage2d_over_texsubimage2d;
     int texture_upload_count;
     base::TimeDelta total_texture_upload_time;
     std::list<Task> tasks;
   };
 
  private:
   // AsyncPixelTransferManager implementation:
   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_