[Chromecast] Default desktop windows to 720p + switch for 1080p

chromecast/base/chromecast_switches.h

Index: chromecast/base/chromecast_switches.h
diff --git a/chromecast/base/chromecast_switches.h b/chromecast/base/chromecast_switches.h
index c4cdd6f8b97aa375b906e83b52899e96206cfa3b..8f44bc1c40bcca3340957dc2dc6086adf759b191 100644
--- a/chromecast/base/chromecast_switches.h
+++ b/chromecast/base/chromecast_switches.h
@@ -50,10 +50,13 @@ extern const char kAlsaFixedOutputSampleRate[];
 // Memory pressure switches
 extern const char kMemPressureSystemReservedKb[];
 
-// GPU switches
+// GPU process switches
 extern const char kCastInitialScreenWidth[];
 extern const char kCastInitialScreenHeight[];
 
+// Graphics switches
+extern const char kDesktopWindow1080p[];
+
 }  // namespace switches
 
 namespace chromecast {