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 7b2974867469d3803d029dedc483dff233290edb..dc2d35a079bd4ec46b9493575dd9b22cb88de4c0 100644
--- a/cc/test/begin_frame_args_test.cc
+++ b/cc/test/begin_frame_args_test.cc
@@ -57,8 +57,8 @@ 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);
@@ -66,8 +66,8 @@ 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);