Add CHROMIUM_ycbcr_422_image extension.

gpu/command_buffer/service/feature_info.cc

Index: gpu/command_buffer/service/feature_info.cc
diff --git a/gpu/command_buffer/service/feature_info.cc b/gpu/command_buffer/service/feature_info.cc
index b1e92e6e4c598915fc9076ebca2deb9e7a5c849b..27ffd71de951a4a776fdd8af8ae8fc907095c1d2 100644
--- a/gpu/command_buffer/service/feature_info.cc
+++ b/gpu/command_buffer/service/feature_info.cc
@@ -167,10 +167,10 @@ FeatureInfo::FeatureFlags::FeatureFlags()
       blend_equation_advanced(false),
       blend_equation_advanced_coherent(false),
       ext_texture_rg(false),
+      chromium_image_ycbcr_422(false),
       enable_subscribe_uniform(false),
       emulate_primitive_restart_fixed_index(false),
-      ext_render_buffer_format_bgra8888(false) {
-}
+      ext_render_buffer_format_bgra8888(false) {}
 
 FeatureInfo::Workarounds::Workarounds() :
 #define GPU_OP(type, name) name(false),
@@ -790,6 +790,11 @@ void FeatureInfo::InitializeFeatures() {
   AddExtensionString("GL_CHROMIUM_iosurface");
 #endif
 
+  if (extensions.Contains("GL_APPLE_ycbcr_422"))
+    AddExtensionString("GL_CHROMIUM_ycbcr_422_image");
+  feature_flags_.chromium_image_ycbcr_422 =
+      extensions.Contains("GL_CHROMIUM_ycbcr_422_image");
+
   // TODO(gman): Add support for these extensions.
   //     GL_OES_depth32