cc: Send all begin frames using a PostTask.

cc/test/scheduler_test_common.cc

Index: cc/test/scheduler_test_common.cc
diff --git a/cc/test/scheduler_test_common.cc b/cc/test/scheduler_test_common.cc
index e9c9f619959f0761133326d0233950c6f12d9909..bd18c9a646c6bd131b6c40b52f5c52827be7e2a9 100644
--- a/cc/test/scheduler_test_common.cc
+++ b/cc/test/scheduler_test_common.cc
@@ -18,24 +18,6 @@ void FakeDelayBasedTimeSourceClient::OnTimerTick() {
   tick_called_ = true;
 }
 
-base::TimeTicks FakeDelayBasedTimeSource::Now() const { return now_; }
-
-TestDelayBasedTimeSource::TestDelayBasedTimeSource(
-    base::SimpleTestTickClock* now_src,
-    OrderedSimpleTaskRunner* task_runner)
-    : DelayBasedTimeSource(task_runner), now_src_(now_src) {}
-
-base::TimeTicks TestDelayBasedTimeSource::Now() const {
-  return now_src_->NowTicks();
-}
-
-std::string TestDelayBasedTimeSource::TypeString() const {
-  return "TestDelayBasedTimeSource";
-}
-
-TestDelayBasedTimeSource::~TestDelayBasedTimeSource() {
-}
-
 std::unique_ptr<FakeCompositorTimingHistory>
 FakeCompositorTimingHistory::Create(
     bool using_synchronous_renderer_compositor) {