cc: Use BeginFrameArgs

cc/output/begin_frame_args.h

Index: cc/output/begin_frame_args.h
diff --git a/cc/output/begin_frame_args.h b/cc/output/begin_frame_args.h
index 22693dbef947dc814479b1cba52d58af149e2cbc..8d65db0f5ce9a42ce7f3afd4387169cfa4373390 100644
--- a/cc/output/begin_frame_args.h
+++ b/cc/output/begin_frame_args.h
@@ -37,9 +37,11 @@ struct CC_EXPORT BeginFrameArgs {
   // retroactively.
   static base::TimeDelta DefaultRetroactiveBeginFramePeriod();
 
-  bool IsValid() const {
-    return interval >= base::TimeDelta();
-  }
+  // For platforms that haven't yet moved to deadline scheduling, this will set
+  // the deadline to 0.
+  void AdjustDeadline(base::TimeDelta delta);
+
+  bool IsValid() const { return interval >= base::TimeDelta(); }
 
   base::TimeTicks frame_time;
   base::TimeTicks deadline;