Rebased changes to apply VideoOptions per stream.

talk/media/base/mediachannel.h

Index: talk/media/base/mediachannel.h
diff --git a/talk/media/base/mediachannel.h b/talk/media/base/mediachannel.h
index 3b27b92dd96d613764f44386e4b9d3dcd07e6297..6cb2021c444bf8e008062cebce0133af2938f633 100644
--- a/talk/media/base/mediachannel.h
+++ b/talk/media/base/mediachannel.h
@@ -238,6 +238,7 @@ struct AudioOptions {
 // We are moving all of the setting of options to structs like this,
 // but some things currently still use flags.
 struct VideoOptions {
+  VideoOptions() {}
   void SetAll(const VideoOptions& change) {
     SetFrom(&video_noise_reduction, change.video_noise_reduction);
     SetFrom(&cpu_overuse_detection, change.cpu_overuse_detection);