Rename "test" ozone platform to "headless"

media/ozone/media_ozone_platform.cc

Index: media/ozone/media_ozone_platform.cc
diff --git a/media/ozone/media_ozone_platform.cc b/media/ozone/media_ozone_platform.cc
index cda13962820c4221e5302cd5aa6e9ff46e52b232..4f0a48e6185f37db47e64d857a99d5b2de4da5c6 100644
--- a/media/ozone/media_ozone_platform.cc
+++ b/media/ozone/media_ozone_platform.cc
@@ -56,6 +56,10 @@ MediaOzonePlatform* CreateMediaOzonePlatformTest() {
   return new MediaOzonePlatformStub;
 }
 
+MediaOzonePlatform* CreateMediaOzonePlatformHeadless() {
+  return new MediaOzonePlatformStub;
+}
+
 MediaOzonePlatform::MediaOzonePlatform() {
   CHECK(!instance_) << "There should only be a single MediaOzonePlatform.";
   instance_ = this;