Decouple PassThroughImageTransportSurface from GpuCommandBufferStub

gpu/ipc/service/image_transport_surface_overlay_mac.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 GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_
 #define GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_
 
 #include <list>
 #include <memory>
 #include <vector>
@@ skipping 17 matching lines @@
 
 namespace gl {
 class GLFence;
 }
 
 namespace gpu {
 
 class ImageTransportSurfaceOverlayMac : public gl::GLSurface,
                                         public ui::GpuSwitchingObserver {
  public:
-  explicit ImageTransportSurfaceOverlayMac(GpuCommandBufferStub* stub);
+  explicit ImageTransportSurfaceOverlayMac(
+      base::WeakPtr<ImageTransportSurfaceDelegate> delegate);
 
   // GLSurface implementation
   bool Initialize(gl::GLSurface::Format format) override;
   void Destroy() override;
   bool Resize(const gfx::Size& size,
               float scale_factor,
               bool has_alpha) override;
   bool IsOffscreen() override;
   gfx::SwapResult SwapBuffers() override;
   gfx::SwapResult PostSubBuffer(int x, int y, int width, int height) override;
@@ skipping 21 matching lines @@
   void SendAcceleratedSurfaceBuffersSwapped(
       CAContextID ca_context_id,
       bool fullscreen_low_power_ca_context_valid,
       CAContextID fullscreen_low_power_ca_context_id,
       const gfx::ScopedRefCountedIOSurfaceMachPort& io_surface,
       const gfx::Size& size,
       float scale_factor,
       std::vector<ui::LatencyInfo> latency_info);
   gfx::SwapResult SwapBuffersInternal(const gfx::Rect& pixel_damage_rect);
 
-  base::WeakPtr<GpuCommandBufferStub> stub_;
+  base::WeakPtr<ImageTransportSurfaceDelegate> delegate_;
   std::vector<ui::LatencyInfo> latency_info_;
 
   bool use_remote_layer_api_;
   base::scoped_nsobject<CAContext> ca_context_;
   base::scoped_nsobject<CAContext> fullscreen_low_power_ca_context_;
   std::unique_ptr<ui::CALayerTreeCoordinator> ca_layer_tree_coordinator_;
 
   gfx::Size pixel_size_;
   float scale_factor_;
 
   std::vector<CALayerInUseQuery> ca_layer_in_use_queries_;
 
   // A GLFence marking the end of the previous frame. Must only be accessed
   // while in a ScopedSetGLToRealGLApi, and while the associated
   // |previous_frame_context_| is bound.
   std::unique_ptr<gl::GLFence> previous_frame_fence_;
   base::ScopedTypeRef<CGLContextObj> fence_context_obj_;
 
   // The renderer ID that all contexts made current to this surface should be
   // targeting.
   GLint gl_renderer_id_;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_SERVICE_IMAGE_TRANSPORT_SURFACE_OVERLAY_MAC_H_