Index: Source/core/frame/History.h |
diff --git a/Source/core/frame/History.h b/Source/core/frame/History.h |
index 3e46eb534c62aab3ea57489dc9ba3e47dacec79a..509d9298346a6291058c8a78db20f68700c99a48 100644 |
--- a/Source/core/frame/History.h |
+++ b/Source/core/frame/History.h |
@@ -44,6 +44,7 @@ class ExceptionState; |
class History FINAL : public RefCountedWillBeGarbageCollectedFinalized<History>, public ScriptWrappable, public DOMWindowProperty { |
DEFINE_WRAPPERTYPEINFO(); |
+ WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(History); |
public: |
static PassRefPtrWillBeRawPtr<History> create(LocalFrame* frame) |
{ |
@@ -62,7 +63,7 @@ public: |
void stateObjectAdded(PassRefPtr<SerializedScriptValue>, const String& title, const String& url, FrameLoadType, ExceptionState&); |
- void trace(Visitor*) { } |
+ virtual void trace(Visitor*) OVERRIDE; |
private: |
explicit History(LocalFrame*); |