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

cc/trees/proxy_main.cc

Index: cc/trees/proxy_main.cc
diff --git a/cc/trees/proxy_main.cc b/cc/trees/proxy_main.cc
index 5b9e7f0e576ca59ba5e35ad962e65c5e0d805468..338f3490d3c58df00e36432da1263638db7ace5d 100644
--- a/cc/trees/proxy_main.cc
+++ b/cc/trees/proxy_main.cc
@@ -74,6 +74,12 @@ void ProxyMain::BeginMainFrameNotExpectedSoon() {
   layer_tree_host_->BeginMainFrameNotExpectedSoon();
 }
 
+void ProxyMain::DoShortIdleWork(const BeginFrameArgs& args) {
+  TRACE_EVENT0("cc", "ProxyMain::DoShortIdleWork");
+  DCHECK(IsMainThread());
+  layer_tree_host_->DoShortIdleWork(args);
+}
+
 void ProxyMain::DidCommitAndDrawFrame() {
   DCHECK(IsMainThread());
   layer_tree_host_->DidCommitAndDrawFrame();