Convert offscreen canvas to use FrameSinkManagerHost.

ui/compositor/test/in_process_context_factory.cc

 // Copyright 2014 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/compositor/test/in_process_context_factory.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 278 matching lines @@
 }
 
 cc::FrameSinkId InProcessContextFactory::AllocateFrameSinkId() {
   return frame_sink_id_allocator_.NextFrameSinkId();
 }
 
 cc::SurfaceManager* InProcessContextFactory::GetSurfaceManager() {
   return surface_manager_;
 }
 
+cc::mojom::DisplayCompositor* InProcessContextFactory::GetDisplayCompositor() {
+  NOTIMPLEMENTED();
+  return nullptr;
+}
+
 void InProcessContextFactory::SetDisplayVisible(ui::Compositor* compositor,
                                                 bool visible) {
   if (!per_compositor_data_.count(compositor))
     return;
   per_compositor_data_[compositor]->display->SetVisible(visible);
 }
 
 void InProcessContextFactory::ResizeDisplay(ui::Compositor* compositor,
                                             const gfx::Size& size) {
   if (!per_compositor_data_.count(compositor))
@@ skipping 26 matching lines @@
     data->surface_handle = tracker->AddSurfaceForNativeWidget(widget);
 #endif
   }
 
   PerCompositorData* return_ptr = data.get();
   per_compositor_data_[compositor] = std::move(data);
   return return_ptr;
 }
 
 }  // namespace ui