Fix for bug 458397 (Memory leak during TopSite Test on http://www.grono.net). r=bent, sr=jst.

layout/style/nsComputedDOMStyle.cpp

@@ -144,8 +144,14 @@ nsComputedDOMStyle::Shutdown()
 }
 
 
+NS_IMPL_CYCLE_COLLECTION_CLASS(nsComputedDOMStyle)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_0(nsComputedDOMStyle)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsComputedDOMStyle)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mContent)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
 // QueryInterface implementation for nsComputedDOMStyle
-NS_INTERFACE_MAP_BEGIN(nsComputedDOMStyle)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsComputedDOMStyle)
   NS_INTERFACE_MAP_ENTRY(nsIComputedDOMStyle)
   NS_INTERFACE_MAP_ENTRY(nsICSSDeclaration)
   NS_INTERFACE_MAP_ENTRY(nsIDOMCSSStyleDeclaration)
@@ -170,9 +176,9 @@ static void doDestroyComputedDOMStyle(nsComputedDOMStyle *aComputedStyle)
   }
 }
 
-NS_IMPL_ADDREF(nsComputedDOMStyle)
-NS_IMPL_RELEASE_WITH_DESTROY(nsComputedDOMStyle,
-                             doDestroyComputedDOMStyle(this))
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsComputedDOMStyle)
+NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_DESTROY(nsComputedDOMStyle,
+                                              doDestroyComputedDOMStyle(this))
 
 
 NS_IMETHODIMP

layout/style/nsComputedDOMStyle.h

@@ -59,7 +59,8 @@
 class nsComputedDOMStyle : public nsIComputedDOMStyle
 {
 public:
-  NS_DECL_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS(nsComputedDOMStyle)
 
   NS_IMETHOD Init(nsIDOMElement *aElement,
                   const nsAString& aPseudoElt,