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

media/cast/test/skewed_tick_clock.cc

Index: media/cast/test/skewed_tick_clock.cc
diff --git a/media/cast/test/skewed_tick_clock.cc b/media/cast/test/skewed_tick_clock.cc
index fd3fb3cc4525188f6294bf8790a5af3cb23b4f7c..272c61e6c9882e4e2b75f436f5d544a8685e4c86 100644
--- a/media/cast/test/skewed_tick_clock.cc
+++ b/media/cast/test/skewed_tick_clock.cc
@@ -25,8 +25,9 @@ base::TimeTicks SkewedTickClock::SkewTicks(base::TimeTicks now) {
 
 void SkewedTickClock::SetSkew(double skew, base::TimeDelta offset) {
   base::TimeTicks now = clock_->NowTicks();
-  last_skew_set_time_ = now;
   skew_clock_at_last_set_ = SkewTicks(now) + offset;
+  skew_ = skew;
+  last_skew_set_time_ = now;
 }
 
 base::TimeTicks SkewedTickClock::NowTicks() {