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

cc/raster/raster_buffer_provider.cc

Index: cc/raster/raster_buffer_provider.cc
diff --git a/cc/raster/raster_buffer_provider.cc b/cc/raster/raster_buffer_provider.cc
index 1eb0fd0346cc38607fc6ead98d618aae01fc5f83..081aaf5362725aeb6af056aee218d8c994a6b9ad 100644
--- a/cc/raster/raster_buffer_provider.cc
+++ b/cc/raster/raster_buffer_provider.cc
@@ -37,6 +37,7 @@ bool IsSupportedPlaybackToMemoryFormat(viz::ResourceFormat format) {
     case viz::RED_8:
     case viz::LUMINANCE_F16:
     case viz::RGBA_F16:
+    case viz::R16_EXT:
       return false;
   }
   NOTREACHED();
@@ -130,6 +131,7 @@ void RasterBufferProvider::PlaybackToMemory(
     case viz::RGB_565:
     case viz::RED_8:
     case viz::LUMINANCE_F16:
+    case viz::R16_EXT:
       NOTREACHED();
       return;
   }
@@ -153,6 +155,7 @@ bool RasterBufferProvider::ResourceFormatRequiresSwizzle(
     case viz::RED_8:
     case viz::LUMINANCE_F16:
     case viz::RGBA_F16:
+    case viz::R16_EXT:
       return false;
   }
   NOTREACHED();