cc: Add MainAndImplFrameTimeDelta UMA.

cc/scheduler/scheduler.cc

Index: cc/scheduler/scheduler.cc
diff --git a/cc/scheduler/scheduler.cc b/cc/scheduler/scheduler.cc
index f6dfccbaf8637325d5326abdadeabe18ecc08fe7..50bab60895911cfe5c531cd170746811397d2a91 100644
--- a/cc/scheduler/scheduler.cc
+++ b/cc/scheduler/scheduler.cc
@@ -664,21 +664,27 @@ void Scheduler::OnBeginImplFrameDeadline() {
 void Scheduler::DrawAndSwapIfPossible() {
   bool drawing_with_new_active_tree =
       state_machine_.active_tree_needs_first_draw();
+  bool main_thread_missed_last_deadline =
+      state_machine_.main_thread_missed_last_deadline();
   compositor_timing_history_->WillDraw();
   state_machine_.WillDraw();
   DrawResult result = client_->ScheduledActionDrawAndSwapIfPossible();
   state_machine_.DidDraw(result);
-  compositor_timing_history_->DidDraw(drawing_with_new_active_tree);
+  compositor_timing_history_->DidDraw(drawing_with_new_active_tree,
+                                      main_thread_missed_last_deadline);
 }
 
 void Scheduler::DrawAndSwapForced() {
   bool drawing_with_new_active_tree =
       state_machine_.active_tree_needs_first_draw();
+  bool main_thread_missed_last_deadline =
+      state_machine_.main_thread_missed_last_deadline();
   compositor_timing_history_->WillDraw();
   state_machine_.WillDraw();
   DrawResult result = client_->ScheduledActionDrawAndSwapForced();
   state_machine_.DidDraw(result);
-  compositor_timing_history_->DidDraw(drawing_with_new_active_tree);
+  compositor_timing_history_->DidDraw(drawing_with_new_active_tree,
+                                      main_thread_missed_last_deadline);
 }
 
 void Scheduler::SetDeferCommits(bool defer_commits) {