cc: Adding BeginFrameTracker object and removing Now() from LTHI.

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 c03c79b05b8f0c7ce1f4b708036dfe5371aa8ad4..1ee2fac933b6e6dbaaa3b5bd3760792942210f18 100644
--- a/cc/scheduler/scheduler_unittest.cc
+++ b/cc/scheduler/scheduler_unittest.cc
@@ -2589,16 +2589,14 @@ TEST_F(SchedulerTest, SynchronousCompositorDoubleCommitWithoutDraw) {
 
 TEST_F(SchedulerTest, AuthoritativeVSyncInterval) {
   SetUpScheduler(true);
-
-  base::TimeDelta initial_interval =
-      scheduler_->begin_impl_frame_args().interval;
+  base::TimeDelta initial_interval = scheduler_->Interval();

[brianderson, 2015/05/01 02:05:21]

scheduler_->Interval() has an ambiguous name. It's not clear if that the display
interval or the current frame interval.

[mithro-old, 2015/05/01 03:27:56]

Fixed.

   base::TimeDelta authoritative_interval =
       base::TimeDelta::FromMilliseconds(33);
 
   scheduler_->SetNeedsCommit();
   EXPECT_SCOPED(AdvanceFrame());
 
-  EXPECT_EQ(initial_interval, scheduler_->begin_impl_frame_args().interval);
+  EXPECT_EQ(initial_interval, scheduler_->Interval());
 
   scheduler_->NotifyBeginMainFrameStarted();
   scheduler_->NotifyReadyToCommit();
@@ -2610,9 +2608,8 @@ TEST_F(SchedulerTest, AuthoritativeVSyncInterval) {
 
   // At the next BeginFrame, authoritative interval is used instead of previous
   // interval.
-  EXPECT_NE(initial_interval, scheduler_->begin_impl_frame_args().interval);
-  EXPECT_EQ(authoritative_interval,
-            scheduler_->begin_impl_frame_args().interval);
+  EXPECT_NE(initial_interval, scheduler_->Interval());
+  EXPECT_EQ(authoritative_interval, scheduler_->Interval());
 }
 
 }  // namespace