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

ui/views/mus/surface_context_factory.cc

 // 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.
 
 #include "ui/views/mus/surface_context_factory.h"
 
 #include "base/memory/ptr_util.h"
 #include "cc/output/output_surface.h"
 #include "cc/resources/shared_bitmap_manager.h"
 #include "cc/surfaces/surface_id_allocator.h"
@@ skipping 21 matching lines @@
 SurfaceContextFactory::SurfaceContextFactory(ui::GpuService* gpu_service)
     : next_surface_id_namespace_(1u), gpu_service_(gpu_service) {}
 
 SurfaceContextFactory::~SurfaceContextFactory() {}
 
 void SurfaceContextFactory::CreateOutputSurface(
     base::WeakPtr<ui::Compositor> compositor) {
   ui::Window* window = compositor->window();
   NativeWidgetMus* native_widget = NativeWidgetMus::GetForWindow(window);
   ui::mojom::SurfaceType surface_type = native_widget->surface_type();
-  std::unique_ptr<cc::OutputSurface> surface(new ui::OutputSurface(
-      gpu_service_, window->RequestSurface(surface_type)));
+  std::unique_ptr<cc::OutputSurface> surface(
+      new ui::OutputSurface(gpu_service_->EstablishGpuChannelSync(),
+                            window->RequestSurface(surface_type)));
   compositor->SetOutputSurface(std::move(surface));
 }
 
 std::unique_ptr<ui::Reflector> SurfaceContextFactory::CreateReflector(
     ui::Compositor* mirroed_compositor,
     ui::Layer* mirroring_layer) {
   // NOTIMPLEMENTED();
   return base::WrapUnique(new FakeReflector);
 }
 
@@ skipping 48 matching lines @@
                                               bool visible) {
   // TODO(fsamuel): display[compositor]->SetVisible(visible);
 }
 
 void SurfaceContextFactory::ResizeDisplay(ui::Compositor* compositor,
                                           const gfx::Size& size) {
   // TODO(fsamuel): display[compositor]->Resize(size);
 }
 
 }  // namespace views