Refactoring the way begin frame sources inside scheduler work.

cc/test/begin_frame_args_test.cc

Index: cc/test/begin_frame_args_test.cc
diff --git a/cc/test/begin_frame_args_test.cc b/cc/test/begin_frame_args_test.cc
index 137d5e12863be408a80f8eac25949be31ae36d72..1c4b236f0ac6a95fdeb35b385510160507fc5c7d 100644
--- a/cc/test/begin_frame_args_test.cc
+++ b/cc/test/begin_frame_args_test.cc
@@ -29,6 +29,18 @@ BeginFrameArgs CreateBeginFrameArgsForTesting(int64 frame_time,
                                 base::TimeDelta::FromInternalValue(interval));
 }
 
+BeginFrameArgs CreateTypedBeginFrameArgsForTesting(
+    int64 frame_time,
+    int64 deadline,
+    int64 interval,
+    BeginFrameArgs::BeginFrameArgsType type) {
+  return BeginFrameArgs::CreateTyped(
+      base::TimeTicks::FromInternalValue(frame_time),
+      base::TimeTicks::FromInternalValue(deadline),
+      base::TimeDelta::FromInternalValue(interval),
+      type);
+}
+
 BeginFrameArgs CreateExpiredBeginFrameArgsForTesting() {
   base::TimeTicks now = gfx::FrameTime::Now();
   return BeginFrameArgs::Create(now,