Update from https://crrev.com/308996

cc/output/begin_frame_args.cc

Index: cc/output/begin_frame_args.cc
diff --git a/cc/output/begin_frame_args.cc b/cc/output/begin_frame_args.cc
index 5744d9dbe843d8e7fff46927f25c4536ddc4090c..786f41ac322db02383835635c1f8d9608c868732 100644
--- a/cc/output/begin_frame_args.cc
+++ b/cc/output/begin_frame_args.cc
@@ -19,6 +19,8 @@ const char* BeginFrameArgs::TypeToString(BeginFrameArgsType type) {
       return "SYNCHRONOUS";
     case BeginFrameArgs::MISSED:
       return "MISSED";
+    case BeginFrameArgs::BEGIN_FRAME_ARGS_TYPE_MAX:
+      return "BEGIN_FRAME_ARGS_TYPE_MAX";
   }
   NOTREACHED();
   return "???";
@@ -47,6 +49,7 @@ BeginFrameArgs BeginFrameArgs::Create(BeginFrameArgs::CreationLocation location,
                                       base::TimeDelta interval,
                                       BeginFrameArgs::BeginFrameArgsType type) {
   DCHECK_NE(type, BeginFrameArgs::INVALID);
+  DCHECK_NE(type, BeginFrameArgs::BEGIN_FRAME_ARGS_TYPE_MAX);
 #ifdef NDEBUG
   return BeginFrameArgs(frame_time, deadline, interval, type);
 #else