Decouple PassThroughImageTransportSurface from GpuCommandBufferStub

gpu/ipc/service/image_transport_surface_win.cc

 // Copyright (c) 2012 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.
 
 #include "gpu/ipc/service/image_transport_surface.h"
 
 #include <memory>
 
 #include "gpu/ipc/service/child_window_surface_win.h"
 #include "gpu/ipc/service/pass_through_image_transport_surface.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface_egl.h"
 #include "ui/gl/init/gl_factory.h"
 #include "ui/gl/vsync_provider_win.h"
 
 namespace gpu {
 
 // static
 scoped_refptr<gl::GLSurface> ImageTransportSurface::CreateNativeSurface(
     GpuChannelManager* manager,
-    GpuCommandBufferStub* stub,
+    base::WeakPtr<ImageTransportSurfaceDelegate> delegate,
     SurfaceHandle surface_handle,
     gl::GLSurface::Format format) {
   DCHECK_NE(surface_handle, kNullSurfaceHandle);
 
   scoped_refptr<gl::GLSurface> surface;
   if (gl::GetGLImplementation() == gl::kGLImplementationEGLGLES2 &&
       gl::GLSurfaceEGL::IsDirectCompositionSupported()) {
     scoped_refptr<ChildWindowSurfaceWin> egl_surface(
         new ChildWindowSurfaceWin(manager, surface_handle));
     surface = egl_surface;
 
     // TODO(stanisc): http://crbug.com/659844:
     // Force DWM based gl::VSyncProviderWin provider to avoid video playback
     // smoothness issues. Once that issue is fixed, passing a nullptr
     // vsync_provider would result in assigning a default VSyncProvider inside
     // the Initialize call.
     std::unique_ptr<gfx::VSyncProvider> vsync_provider(
         new gl::VSyncProviderWin(surface_handle));
 
     if (!egl_surface->Initialize(std::move(vsync_provider)))
       return nullptr;
   } else {
     surface = gl::init::CreateViewGLSurface(surface_handle);
     if (!surface)
       return nullptr;
   }
 
   return scoped_refptr<gl::GLSurface>(
-      new PassThroughImageTransportSurface(stub, surface.get()));
+      new PassThroughImageTransportSurface(delegate, surface.get()));
 }
 
 }  // namespace gpu