Replaced TestNowSource with SimpleTestTickClock.

cc/scheduler/scheduler_unittest.cc

Index: cc/scheduler/scheduler_unittest.cc
diff --git a/cc/scheduler/scheduler_unittest.cc b/cc/scheduler/scheduler_unittest.cc
index 8b2face59e5a382d3f31534307d53a5745694cb6..a2f126816e07dfdb72f4af46ad825f8d6c0026f2 100644
--- a/cc/scheduler/scheduler_unittest.cc
+++ b/cc/scheduler/scheduler_unittest.cc
@@ -253,11 +253,13 @@ class FakeExternalBeginFrameSource : public BeginFrameSourceMixIn {
 class SchedulerTest : public testing::Test {
  public:
   SchedulerTest()
-      : now_src_(TestNowSource::Create()),
+      : now_src_(new base::SimpleTestTickClock(
+            base::TimeTicks::FromInternalValue(10000))),
         task_runner_(new OrderedSimpleTaskRunner(now_src_, true)),
         fake_external_begin_frame_source_(nullptr) {
-    // A bunch of tests require Now() to be > BeginFrameArgs::DefaultInterval()
-    now_src_->AdvanceNow(base::TimeDelta::FromMilliseconds(100));
+    // A bunch of tests require NowTicks() to be >
+    // BeginFrameArgs::DefaultInterval()
+    now_src_->Advance(base::TimeDelta::FromMilliseconds(100));
     // Fail if we need to run 100 tasks in a row.
     task_runner_->SetRunTaskLimit(100);
   }
@@ -300,7 +302,7 @@ class SchedulerTest : public testing::Test {
   }
 
   OrderedSimpleTaskRunner& task_runner() { return *task_runner_; }
-  TestNowSource* now_src() { return now_src_.get(); }
+  base::SimpleTestTickClock* now_src() { return now_src_; }
 
   // As this function contains EXPECT macros, to allow debugging it should be
   // called inside EXPECT_SCOPED like so;
@@ -404,7 +406,7 @@ class SchedulerTest : public testing::Test {
     DCHECK(scheduler_->settings().use_external_begin_frame_source);
     // Creep the time forward so that any BeginFrameArgs is not equal to the
     // last one otherwise we violate the BeginFrameSource contract.
-    now_src_->AdvanceNow(BeginFrameArgs::DefaultInterval());
+    now_src_->Advance(BeginFrameArgs::DefaultInterval());
     BeginFrameArgs args =
         CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE, now_src());
     fake_external_begin_frame_source_->TestOnBeginFrame(args);
@@ -429,7 +431,7 @@ class SchedulerTest : public testing::Test {
       bool impl_side_painting);
   void DidLoseOutputSurfaceAfterReadyToCommit(bool impl_side_painting);
 
-  scoped_refptr<TestNowSource> now_src_;
+  base::SimpleTestTickClock* now_src_;
   scoped_refptr<OrderedSimpleTaskRunner> task_runner_;
   FakeExternalBeginFrameSource* fake_external_begin_frame_source_;
   SchedulerSettings scheduler_settings_;
@@ -1570,9 +1572,9 @@ TEST_F(SchedulerTest, BeginRetroFrame_SwapThrottled) {
 
   // Let time pass sufficiently beyond the regular deadline but not beyond the
   // late deadline.
-  now_src()->AdvanceNow(BeginFrameArgs::DefaultInterval() -
-                        base::TimeDelta::FromMicroseconds(1));
-  task_runner().RunUntilTime(now_src()->Now());
+  now_src()->Advance(BeginFrameArgs::DefaultInterval() -
+                     base::TimeDelta::FromMicroseconds(1));
+  task_runner().RunUntilTime(now_src()->NowTicks());
   EXPECT_TRUE(scheduler_->BeginImplFrameDeadlinePending());
 
   // Take us out of a swap throttled state.
@@ -1583,7 +1585,7 @@ TEST_F(SchedulerTest, BeginRetroFrame_SwapThrottled) {
   client_->Reset();
 
   // Verify that the deadline was rescheduled.
-  task_runner().RunUntilTime(now_src()->Now());
+  task_runner().RunUntilTime(now_src()->NowTicks());
   EXPECT_SINGLE_ACTION("ScheduledActionDrawAndSwapIfPossible", client_);
   EXPECT_FALSE(scheduler_->BeginImplFrameDeadlinePending());
   EXPECT_TRUE(client_->needs_begin_frames());
@@ -1633,7 +1635,7 @@ TEST_F(SchedulerTest, RetroFrameDoesNotExpireTooEarly) {
   EXPECT_NO_ACTION(client_);
 
   // Let's advance to the retro frame's deadline.
-  now_src()->AdvanceNow(retro_frame_args.deadline - now_src()->Now());
+  now_src()->Advance(retro_frame_args.deadline - now_src()->NowTicks());
 
   // The retro frame hasn't expired yet.
   task_runner().RunTasksWhile(client_->ImplFrameDeadlinePending(false));
@@ -1691,8 +1693,8 @@ TEST_F(SchedulerTest, RetroFrameExpiresOnTime) {
   EXPECT_NO_ACTION(client_);
 
   // Let's advance sufficiently past the retro frame's deadline.
-  now_src()->AdvanceNow(retro_frame_args.deadline - now_src()->Now() +
-                        base::TimeDelta::FromMicroseconds(1));
+  now_src()->Advance(retro_frame_args.deadline - now_src()->NowTicks() +
+                     base::TimeDelta::FromMicroseconds(1));
 
   // The retro frame should've expired.
   EXPECT_NO_ACTION(client_);
@@ -1711,7 +1713,7 @@ TEST_F(SchedulerTest, MissedFrameDoesNotExpireTooEarly) {
   missed_frame_args.type = BeginFrameArgs::MISSED;
 
   // Advance to the deadline.
-  now_src()->AdvanceNow(missed_frame_args.deadline - now_src()->Now());
+  now_src()->Advance(missed_frame_args.deadline - now_src()->NowTicks());
 
   // Missed frame is handled because it's on time.
   client_->Reset();
@@ -1736,8 +1738,8 @@ TEST_F(SchedulerTest, MissedFrameExpiresOnTime) {
   missed_frame_args.type = BeginFrameArgs::MISSED;
 
   // Advance sufficiently past the deadline.
-  now_src()->AdvanceNow(missed_frame_args.deadline - now_src()->Now() +
-                        base::TimeDelta::FromMicroseconds(1));
+  now_src()->Advance(missed_frame_args.deadline - now_src()->NowTicks() +
+                     base::TimeDelta::FromMicroseconds(1));
 
   // Missed frame is dropped because it's too late.
   client_->Reset();
@@ -1883,9 +1885,9 @@ void SchedulerTest::BeginFramesNotFromClient_SwapThrottled(
 
   // Let time pass sufficiently beyond the regular deadline but not beyond the
   // late deadline.
-  now_src()->AdvanceNow(BeginFrameArgs::DefaultInterval() -
-                        base::TimeDelta::FromMicroseconds(1));
-  task_runner().RunUntilTime(now_src()->Now());
+  now_src()->Advance(BeginFrameArgs::DefaultInterval() -
+                     base::TimeDelta::FromMicroseconds(1));
+  task_runner().RunUntilTime(now_src()->NowTicks());
   EXPECT_TRUE(scheduler_->BeginImplFrameDeadlinePending());
 
   // Take us out of a swap throttled state.
@@ -1897,9 +1899,9 @@ void SchedulerTest::BeginFramesNotFromClient_SwapThrottled(
   // Verify that the deadline was rescheduled.
   // We can't use RunUntilTime(now) here because the next frame is also
   // scheduled if throttle_frame_production = false.
-  base::TimeTicks before_deadline = now_src()->Now();
+  base::TimeTicks before_deadline = now_src()->NowTicks();
   task_runner().RunTasksWhile(client_->ImplFrameDeadlinePending(true));
-  base::TimeTicks after_deadline = now_src()->Now();
+  base::TimeTicks after_deadline = now_src()->NowTicks();
   EXPECT_EQ(after_deadline, before_deadline);
   EXPECT_FALSE(scheduler_->BeginImplFrameDeadlinePending());
   client_->Reset();
@@ -2008,7 +2010,7 @@ void SchedulerTest::DidLoseOutputSurfaceAfterBeginFrameStartedWithHighLatency(
 
   // BeginImplFrame is not started.
   client_->Reset();
-  task_runner().RunUntilTime(now_src()->Now() +
+  task_runner().RunUntilTime(now_src()->NowTicks() +
                              base::TimeDelta::FromMilliseconds(10));
   EXPECT_NO_ACTION(client_);
   EXPECT_FALSE(scheduler_->BeginImplFrameDeadlinePending());