[Cast] Repair receiver playout time calculations and frame skip logic.

media/cast/video_sender/video_sender_unittest.cc

Index: media/cast/video_sender/video_sender_unittest.cc
diff --git a/media/cast/video_sender/video_sender_unittest.cc b/media/cast/video_sender/video_sender_unittest.cc
index 87d25d153aa5a19a6aae45ce2f49a6d4f3e8a455..a7987a2a0c24311342a4ad2c7a98ee220743e5a0 100644
--- a/media/cast/video_sender/video_sender_unittest.cc
+++ b/media/cast/video_sender/video_sender_unittest.cc
@@ -27,7 +27,6 @@ namespace media {
 namespace cast {
 
 namespace {
-static const int64 kStartMillisecond = INT64_C(12345678900000);
 static const uint8 kPixelValue = 123;
 static const int kWidth = 320;
 static const int kHeight = 240;
@@ -107,8 +106,7 @@ class VideoSenderTest : public ::testing::Test {
  protected:
   VideoSenderTest() {
     testing_clock_ = new base::SimpleTestTickClock();
-    testing_clock_->Advance(
-        base::TimeDelta::FromMilliseconds(kStartMillisecond));
+    testing_clock_->Advance(base::TimeTicks::Now() - base::TimeTicks());
     task_runner_ = new test::FakeSingleThreadTaskRunner(testing_clock_);
     cast_environment_ =
         new CastEnvironment(scoped_ptr<base::TickClock>(testing_clock_).Pass(),