cc: Simplify and rename MainThreadIsInHighLatency logic

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 cf1ab8c5568d1ac6d642fbf804a50b7621b7ac99..560c575e5ecc8ee60e81f0fdfb200b2325adc493 100644
--- a/cc/scheduler/scheduler_state_machine.h
+++ b/cc/scheduler/scheduler_state_machine.h
@@ -143,7 +143,7 @@ class CC_EXPORT SchedulerStateMachine {
 
   // If the main thread didn't manage to produce a new frame in time for the
   // impl thread to draw, it is in a high latency mode.
-  bool MainThreadIsInHighLatencyMode() const;
+  bool main_thread_missed_last_deadline() const;
 
   bool SwapThrottled() const;
 
@@ -337,6 +337,7 @@ class CC_EXPORT SchedulerStateMachine {
   bool active_tree_needs_first_draw_;
   bool did_create_and_initialize_first_output_surface_;
   bool impl_latency_takes_priority_;
+  bool main_thread_missed_last_deadline_;
   bool skip_next_begin_main_frame_to_reduce_latency_;
   bool continuous_painting_;
   bool children_need_begin_frames_;