12-bit vp9 video support

cc/resources/video_resource_updater.h

Index: cc/resources/video_resource_updater.h
diff --git a/cc/resources/video_resource_updater.h b/cc/resources/video_resource_updater.h
index a3a501199341eab044bc33b339fe5851c24492c4..41479ae93d346e000d4501275275ba70a7fc7468 100644
--- a/cc/resources/video_resource_updater.h
+++ b/cc/resources/video_resource_updater.h
@@ -80,6 +80,12 @@ class CC_EXPORT VideoResourceUpdater
   VideoFrameExternalResources CreateExternalResourcesFromVideoFrame(
       scoped_refptr<media::VideoFrame> video_frame);
 
+  // Public for testing only.
+  static void MakeHalfFloats(const uint16_t* src,

[danakj, 2016/09/26 20:35:04]

There are 4 parameters, all are shortened names, and there's 0 comments
explaining what this function does or what the parameters are.

Also, maybe this shouldn't be on VideoResourceUpdater? Though I'd have to
reverse engineer some documentation for this function to suggest anywhere else.

[hubbe, 2016/09/26 21:19:36]

Comment added.

+                             float mult,
+                             size_t num,
+                             uint16_t* dst);
+
  private:
   class PlaneResource {
    public: