Enable BeginFrame scheduling on aura

content/browser/compositor/delegated_frame_host.cc

Index: content/browser/compositor/delegated_frame_host.cc
diff --git a/content/browser/compositor/delegated_frame_host.cc b/content/browser/compositor/delegated_frame_host.cc
index 2faa1a7e520f80705823d55947bf25d28e2cdb81..3cc88b4016eb5357c0dfce1b022bb63973b9c3df 100644
--- a/content/browser/compositor/delegated_frame_host.cc
+++ b/content/browser/compositor/delegated_frame_host.cc
@@ -898,8 +898,7 @@ void DelegatedFrameHost::OnCompositingShuttingDown(ui::Compositor* compositor) {
 void DelegatedFrameHost::OnUpdateVSyncParameters(
     base::TimeTicks timebase,
     base::TimeDelta interval) {
-  vsync_timebase_ = timebase;
-  vsync_interval_ = interval;
+  SetVSyncParameters(timebase, interval);
   if (client_->DelegatedFrameHostIsVisible())
     client_->DelegatedFrameHostUpdateVSyncParameters(timebase, interval);
 }
@@ -977,6 +976,12 @@ void DelegatedFrameHost::ResetCompositor() {
   compositor_ = nullptr;
 }
 
+void DelegatedFrameHost::SetVSyncParameters(const base::TimeTicks& timebase,
+                                            const base::TimeDelta& interval) {
+  vsync_timebase_ = timebase;
+  vsync_interval_ = interval;
+}
+
 void DelegatedFrameHost::LockResources() {
   DCHECK(frame_provider_.get() || !surface_id_.is_null());
   delegated_frame_evictor_->LockFrame();