media: replace LUMINANCE_F16 by RG_88 for 9/10-bit h264 videos

media/renderers/skcanvas_video_renderer.cc

Index: media/renderers/skcanvas_video_renderer.cc
diff --git a/media/renderers/skcanvas_video_renderer.cc b/media/renderers/skcanvas_video_renderer.cc
index 3ff3510a992dd99c35f35aec43f1c262dbc8aa34..7941dc0028e2e212bebbbac965768d70d8153a58 100644
--- a/media/renderers/skcanvas_video_renderer.cc
+++ b/media/renderers/skcanvas_video_renderer.cc
@@ -610,6 +610,12 @@ void SkCanvasVideoRenderer::ConvertVideoFrameToRGBPixels(
     case PIXEL_FORMAT_RGB32:
     case PIXEL_FORMAT_MJPEG:
     case PIXEL_FORMAT_MT21:
+    // TODO(dshwang): Use either I400ToARGB or J400ToARGB depending if we want
+    // BT.601 constrained range of 16 to 240, or JPEG full range BT.601
+    // coefficients. Implement it when Y8/16 foramt is supported.
+    // crbug.com/624436
+    case PIXEL_FORMAT_Y8:
+    case PIXEL_FORMAT_Y16:
     case PIXEL_FORMAT_UNKNOWN:
       NOTREACHED();
   }