Hook up ui::Compositor to Display's BeginFrameSource

cc/output/output_surface.cc

Index: cc/output/output_surface.cc
diff --git a/cc/output/output_surface.cc b/cc/output/output_surface.cc
index 5698635b42125cf54c2f5cd21796608ca32e6e93..4f182a3044b2e58c83600ed5655c95e6d2c8203c 100644
--- a/cc/output/output_surface.cc
+++ b/cc/output/output_surface.cc
@@ -152,17 +152,6 @@ OutputSurface::OutputSurface(scoped_refptr<ContextProvider> context_provider,
                     nullptr,
                     std::move(software_device)) {}
 
-void OutputSurface::CommitVSyncParameters(base::TimeTicks timebase,
-                                          base::TimeDelta interval) {
-  TRACE_EVENT2("cc",
-               "OutputSurface::CommitVSyncParameters",
-               "timebase",
-               (timebase - base::TimeTicks()).InSecondsF(),
-               "interval",
-               interval.InSecondsF());
-  client_->CommitVSyncParameters(timebase, interval);
-}
-
 // Forwarded to OutputSurfaceClient
 void OutputSurface::SetNeedsRedrawRect(const gfx::Rect& damage_rect) {
   TRACE_EVENT0("cc", "OutputSurface::SetNeedsRedrawRect");