Connect the new video rendering path to the compositor.

media/base/media_switches.cc

Index: media/base/media_switches.cc
diff --git a/media/base/media_switches.cc b/media/base/media_switches.cc
index c42bd9ff0ec8ccdeed666c6b76cfa1e9b1f6428c..a6e5cdee9000bac48cc22336b41a64aa623211bc 100644
--- a/media/base/media_switches.cc
+++ b/media/base/media_switches.cc
@@ -9,6 +9,9 @@ namespace switches {
 // Allow users to specify a custom buffer size for debugging purpose.
 const char kAudioBufferSize[] = "audio-buffer-size";
 
+// Enables the new vsync driven video renderering path.
+const char kEnableNewVideoRenderer[] = "enable-new-video-renderer";
+
 // Set number of threads to use for video decoding.
 const char kVideoThreads[] = "video-threads";