Index: third_party/WebKit/Source/core/html/HTMLTrackElement.cpp |
diff --git a/third_party/WebKit/Source/core/html/HTMLTrackElement.cpp b/third_party/WebKit/Source/core/html/HTMLTrackElement.cpp |
index e51919a8b1b8a36f673e34231a816f0fea93954d..d9a9108db84e47dbe6ea33b0f85e5cc76b3d113c 100644 |
--- a/third_party/WebKit/Source/core/html/HTMLTrackElement.cpp |
+++ b/third_party/WebKit/Source/core/html/HTMLTrackElement.cpp |
@@ -94,7 +94,7 @@ void HTMLTrackElement::parseAttribute(const QualifiedName& name, const AtomicStr |
// 4.8.10.12.3 Sourcing out-of-band text tracks |
// As the kind, label, and srclang attributes are set, changed, or removed, the text track must update accordingly... |
} else if (name == kindAttr) { |
- track()->setKind(value.lower()); |
+ track()->setKind(!value.isNull() ? value.lower() : TextTrack::subtitlesKeyword()); |
} else if (name == labelAttr) { |
track()->setLabel(value); |
} else if (name == srclangAttr) { |