part of the fix to bug 66950. For xpconnect the class we mixin to sometimes needs to know if any weak references are outstanding. r=rogerl sr=brendan

xpcom/base/nsWeakReference.h

@@ -55,6 +55,7 @@ class NS_COM nsSupportsWeakReference : public nsISupportsWeakReference
 		protected:
 
 			inline void ClearWeakReferences();
+			PRBool HasWeakReferences() const {return mProxy != 0;}
   };
 
 class NS_COM nsWeakReference : public nsIWeakReference

xpcom/glue/nsWeakReference.h

@@ -55,6 +55,7 @@ class NS_COM nsSupportsWeakReference : public nsISupportsWeakReference
 		protected:
 
 			inline void ClearWeakReferences();
+			PRBool HasWeakReferences() const {return mProxy != 0;}
   };
 
 class NS_COM nsWeakReference : public nsIWeakReference