Get rid of virtual Display::CreateScheduler.

components/mus/surfaces/display_compositor.cc

 // 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.
 
 #include "components/mus/surfaces/display_compositor.h"
 
 #include "cc/output/copy_output_request.h"
 #include "cc/output/output_surface.h"
 #include "cc/output/renderer_settings.h"
 #include "cc/surfaces/display.h"
 #include "components/mus/surfaces/direct_output_surface.h"
 #include "components/mus/surfaces/surfaces_context_provider.h"
 
 #if defined(USE_OZONE)
 #include "components/mus/surfaces/direct_output_surface_ozone.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #endif
 
 namespace mus {
 
 DisplayCompositor::DisplayCompositor(
     scoped_refptr<base::SingleThreadTaskRunner> task_runner,
     gfx::AcceleratedWidget widget,
     const scoped_refptr<GpuState>& gpu_state,
     const scoped_refptr<SurfacesState>& surfaces_state)
     : task_runner_(task_runner),
       surfaces_state_(surfaces_state),
       factory_(surfaces_state->manager(), this),
-      allocator_(surfaces_state->next_id_namespace()) {
+      allocator_(surfaces_state->next_id_namespace()),
+      synthetic_begin_frame_source_(new cc::SyntheticBeginFrameSource(
+          task_runner_.get(),
+          cc::BeginFrameArgs::DefaultInterval())) {
   allocator_.RegisterSurfaceIdNamespace(surfaces_state_->manager());
   surfaces_state_->manager()->RegisterSurfaceFactoryClient(
       allocator_.id_namespace(), this);
 
   scoped_refptr<SurfacesContextProvider> surfaces_context_provider(
       new SurfacesContextProvider(widget, gpu_state));
   // TODO(rjkroege): If there is something better to do than CHECK, add it.
   CHECK(surfaces_context_provider->BindToCurrentThread());
 
   std::unique_ptr<cc::OutputSurface> display_output_surface;
   if (surfaces_context_provider->ContextCapabilities().surfaceless) {
 #if defined(USE_OZONE)
     display_output_surface = base::WrapUnique(new DirectOutputSurfaceOzone(
-        surfaces_context_provider, widget, task_runner_.get(), GL_TEXTURE_2D,
-        GL_RGB));
+        surfaces_context_provider, widget, synthetic_begin_frame_source_.get(),
+        GL_TEXTURE_2D, GL_RGB));
 #else
     NOTREACHED();
 #endif
   } else {
-    display_output_surface = base::WrapUnique(
-        new DirectOutputSurface(surfaces_context_provider, task_runner_.get()));
+    display_output_surface = base::WrapUnique(new DirectOutputSurface(
+        surfaces_context_provider, synthetic_begin_frame_source_.get()));
   }
 
   int max_frames_pending =
       display_output_surface->capabilities().max_frames_pending;
   DCHECK_GT(max_frames_pending, 0);
 
-  display_.reset(
-      new cc::Display(surfaces_state_->manager(), nullptr /* bitmap_manager */,
-                      nullptr /* gpu_memory_buffer_manager */,
-                      cc::RendererSettings(), allocator_.id_namespace(),
-                      task_runner_.get(), std::move(display_output_surface)));
+  display_.reset(new cc::Display(
+      surfaces_state_->manager(), nullptr /* bitmap_manager */,
+      nullptr /* gpu_memory_buffer_manager */, cc::RendererSettings(),
+      allocator_.id_namespace(), task_runner_.get(),
+      synthetic_begin_frame_source_.get(), std::move(display_output_surface)));
 
   bool init = display_->Initialize(this);
   DCHECK(init);  // The context provider was already bound above.
 }
 
 DisplayCompositor::~DisplayCompositor() {
   surfaces_state_->manager()->UnregisterSurfaceFactoryClient(
       allocator_.id_namespace());
 }
 
@@ skipping 32 matching lines @@
 void DisplayCompositor::DisplayOutputSurfaceLost() {
   // TODO(fsamuel): This looks like it would crash if a frame was in flight and
   // will be submitted.
   display_.reset();
 }
 
 void DisplayCompositor::DisplaySetMemoryPolicy(
     const cc::ManagedMemoryPolicy& policy) {}
 
 }  // namespace mus