Hide media sinks that don't have a name in the cast system tray.

chrome/browser/ui/ash/cast_config_delegate_media_router.cc

Index: chrome/browser/ui/ash/cast_config_delegate_media_router.cc
diff --git a/chrome/browser/ui/ash/cast_config_delegate_media_router.cc b/chrome/browser/ui/ash/cast_config_delegate_media_router.cc
index 304b27d446f0353c9beff87cd830bfef94cca5bf..1e596e5c081c147469eab9632db094dd12837d4d 100644
--- a/chrome/browser/ui/ash/cast_config_delegate_media_router.cc
+++ b/chrome/browser/ui/ash/cast_config_delegate_media_router.cc
@@ -95,7 +95,17 @@ void CastDeviceCache::Init() {
 }
 
 void CastDeviceCache::OnSinksReceived(const MediaSinks& sinks) {
-  sinks_ = sinks;
+  // The media router adds a MediaSink instance that doesn't have a name. Make
+  // sure to filter that sink out from the UI so it is not rendered, as it will
+  // be a line that only has a icon with no apparent meaning.
+  sinks_.clear();
+  for (const media_router::MediaSink& sink : sinks) {
+    if (sink.name().empty())

[amp, 2016/06/02 16:49:24]

Until we can duplicate the logic in
https://cs.chromium.org/chromium/src/chrome/browser/ui/webui/media_router/med...
we should also filter out all sinks with a domain.

if (!sink.domain().empty())
  continue;

This should also cover the case where sinks are coming back with no name, as
those are specifically tied to having a domain.

[jdufault, 2016/06/02 17:35:14]

Done.

+      continue;
+
+    sinks_.push_back(sink);
+  }
+
   cast_config_delegate_->RequestDeviceRefresh();
 }