Added Get/Set methods to content IDs. An ID is used as a key to store state information about a content object and its associated frame object. The state information is stored in a dictionary that is manipulated by the frame manager (nsIFrameManager) inside layout. An opaque pointer to this dictionary is passed to the session history as a handle associated with the current document's state.

git-svn-id: svn://10.0.0.236/trunk@45321 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/layout/html/content/src/nsAttributeContent.cpp

@@ -136,6 +136,16 @@ public:
                           nsIDOMEvent** aDOMEvent,
                           PRUint32 aFlags,
                           nsEventStatus& aEventStatus);
+
+  NS_IMETHOD GetContentID(PRUint32* aID) {
+    *aID = 0;
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+
+  NS_IMETHOD SetContentID(PRUint32 aID) {
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+
   NS_IMETHOD RangeAdd(nsIDOMRange& aRange);
   NS_IMETHOD RangeRemove(nsIDOMRange& aRange);
   NS_IMETHOD GetRangeList(nsVoidArray*& aResult) const;