[media]: Replace LUMINANCE_F16 by R16 for 9/10-bit h264 videos.

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 23da3b97da054a69e1ba9a8bbf982fb832232dd3..d7fc8025bb98a2453183a0266cb0e8c26daede2d 100644
--- a/media/base/media_switches.cc
+++ b/media/base/media_switches.cc
@@ -242,6 +242,10 @@ const base::Feature kSpecCompliantCanPlayThrough{
 const base::Feature kUseNewMediaCache{"use-new-media-cache",
                                       base::FEATURE_ENABLED_BY_DEFAULT};
 
+// Use R16 texture for 9-16 bit channel instead of half-float conversion by CPU.
+const base::Feature kUseR16Texture{"use-r16-texture",
+                                   base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Correct video colors based on output display?
 const base::Feature kVideoColorManagement{"video-color-management",
                                           base::FEATURE_DISABLED_BY_DEFAULT};