Add NV12 buffer scanout support from exo to ozone.

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 6e81ab67bb16f6c40c3775b676c2420785689b79..4ce5c2d52e1df4e82416aaf2106195f4ea14c8f5 100644
--- a/gpu/command_buffer/service/feature_info.cc
+++ b/gpu/command_buffer/service/feature_info.cc
@@ -1011,6 +1011,12 @@ void FeatureInfo::InitializeFeatures() {
     AddExtensionString("GL_CHROMIUM_ycbcr_420v_image");
     feature_flags_.chromium_image_ycbcr_420v = true;
   }
+
+#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_ARM_FAMILY)
+  // TODO(dcastagna): Determine this feature at runtime querying minigbm.
+  // crbug.com/646148
+  AddExtensionString("GL_CHROMIUM_ycbcr_420v_image");
+  feature_flags_.chromium_image_ycbcr_420v = true;
 #endif
 
   if (extensions.Contains("GL_APPLE_ycbcr_422")) {