cc: Allow sending BeginMainFrame before draw or activation

cc/scheduler/scheduler_state_machine.h

Index: cc/scheduler/scheduler_state_machine.h
diff --git a/cc/scheduler/scheduler_state_machine.h b/cc/scheduler/scheduler_state_machine.h
index 9655c93453a3a19c978eac4d65df18eadc0bde7b..38888b1d415e8db348071172eb997ea35d990028 100644
--- a/cc/scheduler/scheduler_state_machine.h
+++ b/cc/scheduler/scheduler_state_machine.h
@@ -61,7 +61,6 @@ class CC_EXPORT SchedulerStateMachine {
     COMMIT_STATE_IDLE,
     COMMIT_STATE_FRAME_IN_PROGRESS,
     COMMIT_STATE_READY_TO_COMMIT,
-    COMMIT_STATE_WAITING_FOR_FIRST_DRAW,
   };
   static const char* CommitStateToString(CommitState state);
 
@@ -192,6 +191,9 @@ class CC_EXPORT SchedulerStateMachine {
   void NotifyReadyToActivate();
 
   bool has_pending_tree() const { return has_pending_tree_; }
+  bool active_tree_needs_first_draw() const {
+    return active_tree_needs_first_draw_;
+  }
 
   void DidLoseOutputSurface();
   void DidCreateAndInitializeOutputSurface();