Get rid of virtual Display::CreateScheduler.

components/mus/surfaces/display_compositor.h

 // Copyright 2016 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 COMPONENTS_MUS_SURFACES_DISPLAY_COMPOSITOR_H_
 #define COMPONENTS_MUS_SURFACES_DISPLAY_COMPOSITOR_H_
 
 #include "cc/surfaces/display_client.h"
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_factory.h"
 #include "cc/surfaces/surface_factory_client.h"
 #include "cc/surfaces/surface_id_allocator.h"
 #include "components/mus/gles2/gpu_state.h"
 #include "components/mus/surfaces/surfaces_state.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace cc {
 class Display;
+class SyntheticBeginFrameSource;
 }
 
 namespace mus {
 
 // TODO(fsamuel): This should become a mojo interface for the mus-gpu split.
 // TODO(fsamuel): This should not be a SurfaceFactoryClient.
 // The DisplayCompositor receives CompositorFrames from all sources,
 // creates a top-level CompositorFrame once per tick, and generates graphical
 // output.
 class DisplayCompositor : public cc::SurfaceFactoryClient,
@@ skipping 35 matching lines @@
   void DisplayOutputSurfaceLost() override;
   void DisplaySetMemoryPolicy(const cc::ManagedMemoryPolicy& policy) override;
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   scoped_refptr<SurfacesState> surfaces_state_;
   cc::SurfaceFactory factory_;
   cc::SurfaceIdAllocator allocator_;
   cc::SurfaceId surface_id_;
 
   gfx::Size display_size_;
+
+  std::unique_ptr<cc::SyntheticBeginFrameSource> synthetic_begin_frame_source_;
   std::unique_ptr<cc::Display> display_;
+
   DISALLOW_COPY_AND_ASSIGN(DisplayCompositor);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_SURFACES_DISPLAY_COMPOSITOR_H_