Create a new action triggered when a BeginMainFrame is not expected before vsync

ui/compositor/compositor.cc

Index: ui/compositor/compositor.cc
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc
index b9078b680ef0f82a3ff8e79148a2888acc6cd357..c1a1550e59e8e24081880de1ad421e89cff75979 100644
--- a/ui/compositor/compositor.cc
+++ b/ui/compositor/compositor.cc
@@ -497,6 +497,8 @@ void Compositor::BeginMainFrame(const cc::BeginFrameArgs& args) {
 void Compositor::BeginMainFrameNotExpectedSoon() {
 }
 
+void Compositor::DoShortIdleWork(const cc::BeginFrameArgs& args) {}
+
 static void SendDamagedRectsRecursive(ui::Layer* layer) {
   layer->SendDamagedRects();
   for (auto* child : layer->children())