Replaced TestNowSource with SimpleTestTickClock.

cc/surfaces/display_scheduler_unittest.cc

Index: cc/surfaces/display_scheduler_unittest.cc
diff --git a/cc/surfaces/display_scheduler_unittest.cc b/cc/surfaces/display_scheduler_unittest.cc
index ab526f8fee569d8d428646197e131b5a587aae93..c459684d867a15e7c9bf6d730cdd274dbb0ba97e 100644
--- a/cc/surfaces/display_scheduler_unittest.cc
+++ b/cc/surfaces/display_scheduler_unittest.cc
@@ -6,11 +6,11 @@
 
 #include "base/logging.h"
 #include "base/test/null_task_runner.h"
+#include "base/test/simple_test_tick_clock.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/surfaces/display.h"
 #include "cc/test/scheduler_test_common.h"
-#include "cc/test/test_now_source.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
@@ -70,7 +70,8 @@ class DisplaySchedulerTest : public testing::Test {
  public:
   DisplaySchedulerTest() {
     const int max_pending_swaps = 1;
-    now_src_ = TestNowSource::Create();
+    now_src_ = new base::SimpleTestTickClock();
+    now_src_->Advance(base::TimeDelta::FromInternalValue(10000));
     null_task_runner_ = make_scoped_refptr(new base::NullTaskRunner);
     client_ = make_scoped_ptr(new FakeDisplaySchedulerClient);
     scheduler_ = make_scoped_ptr(
@@ -83,7 +84,7 @@ class DisplaySchedulerTest : public testing::Test {
   void SetUp() override { scheduler_->SetRootSurfaceResourcesLocked(false); }
 
   void BeginFrameForTest() {
-    base::TimeTicks frame_time = now_src_->Now();
+    base::TimeTicks frame_time = now_src_->NowTicks();
     base::TimeDelta interval = BeginFrameArgs::DefaultInterval();
     base::TimeTicks deadline = frame_time + interval -
                                BeginFrameArgs::DefaultEstimatedParentDrawTime();
@@ -93,11 +94,11 @@ class DisplaySchedulerTest : public testing::Test {
   }
 
  protected:
-  TestNowSource& now_src() { return *now_src_; }
+  base::SimpleTestTickClock& now_src() { return *now_src_; }
   FakeDisplaySchedulerClient& client() { return *client_; }
   DisplayScheduler& scheduler() { return *scheduler_; }
 
-  scoped_refptr<TestNowSource> now_src_;
+  base::SimpleTestTickClock* now_src_;
   scoped_refptr<base::NullTaskRunner> null_task_runner_;
 
   FakeBeginFrameSource fake_begin_frame_source_;
@@ -108,10 +109,10 @@ class DisplaySchedulerTest : public testing::Test {
 TEST_F(DisplaySchedulerTest, EntireDisplayDamagedDrawsImmediately) {
   SurfaceId root_surface_id(1);
   BeginFrameForTest();
-  EXPECT_LT(now_src().Now(),
+  EXPECT_LT(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
   scheduler_->EntireDisplayDamaged(root_surface_id);
-  EXPECT_GE(now_src().Now(),
+  EXPECT_GE(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
 }
 
@@ -131,12 +132,12 @@ TEST_F(DisplaySchedulerTest, SurfaceDamaged) {
   // Damage only from surface 2 (inactive) does not trigger deadline early.
   BeginFrameForTest();
   scheduler_->SurfaceDamaged(sid2);
-  EXPECT_LT(now_src().Now(),
+  EXPECT_LT(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
 
   // Damage from surface 1 triggers deadline early.
   scheduler_->SurfaceDamaged(sid1);
-  EXPECT_GE(now_src().Now(),
+  EXPECT_GE(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
   scheduler_->BeginFrameDeadlineForTest();
 
@@ -148,13 +149,13 @@ TEST_F(DisplaySchedulerTest, SurfaceDamaged) {
 
   // Deadline doesn't trigger early until surface 1 and 2 are both damaged.
   BeginFrameForTest();
-  EXPECT_LT(now_src().Now(),
+  EXPECT_LT(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
   scheduler_->SurfaceDamaged(sid1);
-  EXPECT_LT(now_src().Now(),
+  EXPECT_LT(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
   scheduler_->SurfaceDamaged(sid2);
-  EXPECT_GE(now_src().Now(),
+  EXPECT_GE(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
   scheduler_->BeginFrameDeadlineForTest();
 }
@@ -164,7 +165,7 @@ TEST_F(DisplaySchedulerTest, OutputSurfaceLost) {
 
   // DrawAndSwap normally.
   BeginFrameForTest();
-  EXPECT_LT(now_src().Now(),
+  EXPECT_LT(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
   EXPECT_EQ(0, client_->draw_and_swap_count());
   scheduler_->SurfaceDamaged(sid1);
@@ -173,10 +174,10 @@ TEST_F(DisplaySchedulerTest, OutputSurfaceLost) {
 
   // Deadline triggers immediately on OutputSurfaceLost.
   BeginFrameForTest();
-  EXPECT_LT(now_src().Now(),
+  EXPECT_LT(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
   scheduler_->OutputSurfaceLost();
-  EXPECT_GE(now_src().Now(),
+  EXPECT_GE(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
 
   // Deadline does not DrawAndSwap after OutputSurfaceLost.
@@ -192,7 +193,7 @@ TEST_F(DisplaySchedulerTest, RootSurfaceResourcesLocked) {
 
   // DrawAndSwap normally.
   BeginFrameForTest();
-  EXPECT_LT(now_src().Now(),
+  EXPECT_LT(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
   EXPECT_EQ(0, client_->draw_and_swap_count());
   scheduler_->SurfaceDamaged(sid1);
@@ -200,7 +201,7 @@ TEST_F(DisplaySchedulerTest, RootSurfaceResourcesLocked) {
   EXPECT_EQ(1, client_->draw_and_swap_count());
 
   // Deadline triggers late while root resources are locked.
-  late_deadline = now_src().Now() + BeginFrameArgs::DefaultInterval();
+  late_deadline = now_src().NowTicks() + BeginFrameArgs::DefaultInterval();
   BeginFrameForTest();
   scheduler_->SurfaceDamaged(sid1);
   EXPECT_GT(late_deadline, scheduler_->DesiredBeginFrameDeadlineTimeForTest());
@@ -214,7 +215,7 @@ TEST_F(DisplaySchedulerTest, RootSurfaceResourcesLocked) {
   EXPECT_EQ(1, client_->draw_and_swap_count());
 
   //  Deadline triggers normally when root resources are unlocked.
-  late_deadline = now_src().Now() + BeginFrameArgs::DefaultInterval();
+  late_deadline = now_src().NowTicks() + BeginFrameArgs::DefaultInterval();
   BeginFrameForTest();
   scheduler_->SurfaceDamaged(sid1);
   EXPECT_EQ(late_deadline, scheduler_->DesiredBeginFrameDeadlineTimeForTest());
@@ -244,7 +245,7 @@ TEST_F(DisplaySchedulerTest, DidSwapBuffers) {
 
   // DrawAndSwap normally.
   BeginFrameForTest();
-  EXPECT_LT(now_src().Now(),
+  EXPECT_LT(now_src().NowTicks(),
             scheduler_->DesiredBeginFrameDeadlineTimeForTest());
   EXPECT_EQ(2, client_->draw_and_swap_count());
   scheduler_->SurfaceDamaged(sid1);
@@ -268,11 +269,11 @@ TEST_F(DisplaySchedulerTest, DidSwapBuffers) {
 
   // Deadline triggers normally once not swap throttled.
   // Damage from previous BeginFrame should cary over, so don't damage again.
-  late_deadline = now_src().Now() + BeginFrameArgs::DefaultInterval();
+  late_deadline = now_src().NowTicks() + BeginFrameArgs::DefaultInterval();
   scheduler_->DidSwapBuffersComplete();
   BeginFrameForTest();
   EXPECT_GT(scheduler_->DesiredBeginFrameDeadlineTimeForTest(),
-            now_src().Now());
+            now_src().NowTicks());
   EXPECT_LT(scheduler_->DesiredBeginFrameDeadlineTimeForTest(), late_deadline);
   // Still waiting for surface 2. Once it updates, deadline should trigger
   // immediately again.