Splitting the Mus demo code out of a service.

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>
 
 #include "base/compiler_specific.h"
 #include "base/containers/hash_tables.h"
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "gpu/GLES2/gl2chromium.h"
 #include "gpu/GLES2/gl2extchromium.h"
 #include "services/ui/public/cpp/window_surface.h"
 #include "services/ui/public/cpp/window_surface_client.h"
 #include "services/ui/public/interfaces/surface.mojom.h"
 
+namespace gpu {
+class GpuChannelHost;
+}
+
 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:
@@ skipping 11 matching lines @@
 
   // Sets a bitmap.
   void SetBitmap(int width,
                  int height,
                  std::unique_ptr<std::vector<unsigned char>> data,
                  Format format);
 
  private:
   void Upload();
 
+  void OnGpuChannelEstablished(scoped_refptr<gpu::GpuChannelHost> gpu_channel);
+
   uint32_t BindTextureForSize(const gfx::Size& size);
 
   uint32_t TextureFormat() const {
     return format_ == BGRA ? GL_BGRA_EXT : GL_RGBA;
   }
 
   void SetIdNamespace(uint32_t id_namespace);
 
   // WindowSurfaceClient implementation.
   void OnResourcesReturned(WindowSurface* surface,
                            const cc::ReturnedResourceArray& 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_;
 
   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_;
 
+  base::WeakPtrFactory<BitmapUploader> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(BitmapUploader);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_DEMO_BITMAP_UPLOADER_H_