Cast: Enable high-resolution timers while casting.

chrome/renderer/media/cast_receiver_session_delegate.cc

Index: chrome/renderer/media/cast_receiver_session_delegate.cc
diff --git a/chrome/renderer/media/cast_receiver_session_delegate.cc b/chrome/renderer/media/cast_receiver_session_delegate.cc
index 35099894f75366a90217c4abf882ca045ffaefee..1402b7d6dcf93e7a1eb08e94afc372403a9e4fac 100644
--- a/chrome/renderer/media/cast_receiver_session_delegate.cc
+++ b/chrome/renderer/media/cast_receiver_session_delegate.cc
@@ -5,12 +5,20 @@
 #include "chrome/renderer/media/cast_receiver_session_delegate.h"
 
 #include "base/synchronization/waitable_event.h"
+#include "base/time/time.h"
 #include "base/values.h"
 
 CastReceiverSessionDelegate::CastReceiverSessionDelegate()
     : weak_factory_(this) {
+#if defined(OS_WIN)
+  base::Time::ActivateHighResolutionTimer(true);

[miu, 2015/05/07 02:58:00]

Consider adding a LOG(WARNING) message if this function returns false.

[miu, 2015/05/07 02:58:00]

Also, should all these code changes go in CastSessionDelegateBase so that both a
sender and receiver gets high-res timers?  Or, did you evaluate that the sender
doesn't need high-res timers?

[hubbe, 2015/05/07 19:16:50]

No thinking, I just put it in the wrong place. :)

[hubbe, 2015/05/07 19:16:50]

Done.

+#endif
+}
+CastReceiverSessionDelegate::~CastReceiverSessionDelegate() {
+#if defined(OS_WIN)
+  base::Time::ActivateHighResolutionTimer(false);
+#endif
 }
-CastReceiverSessionDelegate::~CastReceiverSessionDelegate() {}
 
 void CastReceiverSessionDelegate::LogRawEvents(
     const std::vector<media::cast::PacketEvent>& packet_events,