Replaced TestNowSource with SimpleTestTickClock.

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 c176a0e6ee877333bc6e20511b1b768ad72f58fd..977dc41bb9680b530abdde409f765623a49a5490 100644
--- a/cc/test/begin_frame_args_test.cc
+++ b/cc/test/begin_frame_args_test.cc
@@ -56,8 +56,8 @@ BeginFrameArgs CreateExpiredBeginFrameArgsForTesting(
 
 BeginFrameArgs CreateBeginFrameArgsForTesting(
     BeginFrameArgs::CreationLocation location,
-    scoped_refptr<TestNowSource> now_src) {
-  base::TimeTicks now = now_src->Now();
+    base::SimpleTestTickClock* now_src) {
+  base::TimeTicks now = now_src->NowTicks();
   return BeginFrameArgs::Create(
       location, now, now + (BeginFrameArgs::DefaultInterval() / 2),
       BeginFrameArgs::DefaultInterval(), BeginFrameArgs::NORMAL);
@@ -65,8 +65,8 @@ BeginFrameArgs CreateBeginFrameArgsForTesting(
 
 BeginFrameArgs CreateExpiredBeginFrameArgsForTesting(
     BeginFrameArgs::CreationLocation location,
-    scoped_refptr<TestNowSource> now_src) {
-  base::TimeTicks now = now_src->Now();
+    base::SimpleTestTickClock* now_src) {
+  base::TimeTicks now = now_src->NowTicks();
   return BeginFrameArgs::Create(
       location, now, now - BeginFrameArgs::DefaultInterval(),
       BeginFrameArgs::DefaultInterval(), BeginFrameArgs::NORMAL);