Get rid of virtual Display::CreateScheduler.

components/mus/surfaces/direct_output_surface_ozone.cc

Index: components/mus/surfaces/direct_output_surface_ozone.cc
diff --git a/components/mus/surfaces/direct_output_surface_ozone.cc b/components/mus/surfaces/direct_output_surface_ozone.cc
index bf28be848ca78cf2b7dcc68a15e8bfada551a621..a0a7e8b86ad2184694d02380445f726f9b2957f3 100644
--- a/components/mus/surfaces/direct_output_surface_ozone.cc
+++ b/components/mus/surfaces/direct_output_surface_ozone.cc
@@ -10,6 +10,7 @@
 #include "cc/output/compositor_frame.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/output_surface_client.h"
+#include "cc/scheduler/begin_frame_source.h"
 #include "components/display_compositor/buffer_queue.h"
 #include "components/mus/gles2/mojo_gpu_memory_buffer_manager.h"
 #include "components/mus/surfaces/surfaces_context_provider.h"
@@ -23,7 +24,7 @@ namespace mus {
 DirectOutputSurfaceOzone::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)
     : cc::OutputSurface(context_provider, nullptr, nullptr),
@@ -35,9 +36,7 @@ DirectOutputSurfaceOzone::DirectOutputSurfaceOzone(
                                     &gl_helper_,
                                     &gpu_memory_buffer_manager_,
                                     widget)),
-      synthetic_begin_frame_source_(new cc::SyntheticBeginFrameSource(
-          task_runner,
-          cc::BeginFrameArgs::DefaultInterval())),
+      synthetic_begin_frame_source_(synthetic_begin_frame_source),
       weak_ptr_factory_(this) {
   capabilities_.uses_default_gl_framebuffer = false;
   capabilities_.flipped_output_surface = true;
@@ -100,8 +99,6 @@ bool DirectOutputSurfaceOzone::BindToClient(cc::OutputSurfaceClient* client) {
   if (!cc::OutputSurface::BindToClient(client))
     return false;
 
-  client->SetBeginFrameSource(synthetic_begin_frame_source_.get());
-
   if (capabilities_.uses_default_gl_framebuffer) {
     capabilities_.flipped_output_surface =
         context_provider()->ContextCapabilities().flips_vertically;