Get rid of virtual Display::CreateScheduler.

components/mus/surfaces/direct_output_surface_ozone.h

Index: components/mus/surfaces/direct_output_surface_ozone.h
diff --git a/components/mus/surfaces/direct_output_surface_ozone.h b/components/mus/surfaces/direct_output_surface_ozone.h
index f47725aa0194833840a91d1cd5641264296fe8c2..c083e704948dcca15282bda6c6bea2c3e6c8f0e0 100644
--- a/components/mus/surfaces/direct_output_surface_ozone.h
+++ b/components/mus/surfaces/direct_output_surface_ozone.h
@@ -10,7 +10,6 @@
 #include "base/memory/weak_ptr.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/output_surface.h"
-#include "cc/scheduler/begin_frame_source.h"
 #include "components/display_compositor/gl_helper.h"
 #include "components/mus/surfaces/ozone_gpu_memory_buffer_manager.h"
 #include "ui/gfx/geometry/size.h"
@@ -28,6 +27,7 @@ class LatencyInfo;
 
 namespace cc {
 class CompositorFrame;
+class SyntheticBeginFrameSource;
 }  // namespace cc
 
 namespace mus {
@@ -43,12 +43,16 @@ class DirectOutputSurfaceOzone : public cc::OutputSurface {
   DirectOutputSurfaceOzone(
       scoped_refptr<SurfacesContextProvider> context_provider,
       gfx::AcceleratedWidget widget,
-      base::SingleThreadTaskRunner* task_runner,
+      cc::SyntheticBeginFrameSource* synthetic_begin_frame_source,
       uint32_t target,
       uint32_t internalformat);
 
   ~DirectOutputSurfaceOzone() override;
 
+  cc::BeginFrameSource* GetBeginFrameSource() {
+    return synthetic_begin_frame_source_.get();
+  }
+
   // TODO(rjkroege): Implement the equivalent of Reflector.
 
  private:
@@ -70,7 +74,7 @@ class DirectOutputSurfaceOzone : public cc::OutputSurface {
   display_compositor::GLHelper gl_helper_;
   OzoneGpuMemoryBufferManager gpu_memory_buffer_manager_;
   std::unique_ptr<display_compositor::BufferQueue> buffer_queue_;
-  std::unique_ptr<cc::SyntheticBeginFrameSource> synthetic_begin_frame_source_;
+  cc::SyntheticBeginFrameSource* const synthetic_begin_frame_source_;
 
   base::WeakPtrFactory<DirectOutputSurfaceOzone> weak_ptr_factory_;
 };