services/ui: Use a gpu::GpuChannelHost when creating ui::OutputSurface.

services/ui/demo/bitmap_uploader.h

 // Copyright 2015 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 SERVICES_UI_DEMO_BITMAP_UPLOADER_H_
 #define SERVICES_UI_DEMO_BITMAP_UPLOADER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 10 matching lines @@
 namespace ui {
 class GLES2Context;
 class GpuService;
 
 extern const char kBitmapUploaderForAcceleratedWidget[];
 
 // BitmapUploader is useful if you want to draw a bitmap or color in a
 // Window.
 class BitmapUploader : public WindowSurfaceClient {
  public:
-  BitmapUploader(Window* window, GpuService* gpu_service);
+  explicit BitmapUploader(Window* window);
   ~BitmapUploader() override;
 
-  void Init();
-
+  void Init(GpuService* gpu_service);
   // Sets the color which is RGBA.
   void SetColor(uint32_t color);
 
   enum Format {
     RGBA,  // Pixel layout on Android.
     BGRA,  // Pixel layout everywhere else.
   };
 
   // Sets a bitmap.
   void SetBitmap(int width,
@@ skipping 15 matching lines @@
   // WindowSurfaceClient implementation.
   void OnResourcesReturned(
       WindowSurface* surface,
       mojo::Array<cc::ReturnedResource> resources) override;
 
   Window* window_;
   std::unique_ptr<WindowSurface> surface_;
   // This may be null if there is an error contacting mus/initializing. We
   // assume we'll be shutting down soon and do nothing in this case.
   std::unique_ptr<GLES2Context> gles2_context_;
-  GpuService* gpu_service_;
 
   uint32_t color_;
   int width_;
   int height_;
   Format format_;
   std::unique_ptr<std::vector<unsigned char>> bitmap_;
   uint32_t next_resource_id_;
   base::hash_map<uint32_t, uint32_t> resource_to_texture_id_map_;
 
   DISALLOW_COPY_AND_ASSIGN(BitmapUploader);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_DEMO_BITMAP_UPLOADER_H_