WebDAV, NPOTB.

DELETE can return a multistatus, so enhance the API a bit to convey that data.

We don't call the detailed-report facet yet at all, but it's there for when
we do!

extensions/webdav/public/nsIWebDAVListener.idl

@@ -80,3 +80,10 @@ interface nsIWebDAVOperationListener : nsISupports
     void onMakeCollectionResult(in unsigned long aStatusCode,
                                 in nsIWebDAVResource aResource);
 };
+
+[scriptable,uuid(be99d517-9161-4a7d-8bee-2ee98c1c2c6f)]
+interface nsIWebDAVDetailedOperationListener : nsIWebDAVOperationListener
+{
+    void onResultDetail(in unsigned long statusCode, in AUTF8String resource,
+                        in AString method);
+};

extensions/webdav/public/nsIWebDAVService.idl

@@ -86,7 +86,7 @@ interface nsIWebDAVService : nsISupports
              in nsIWebDAVOperationListener listener);
 
     void remove(in nsIWebDAVResource resource,
-                in nsIWebDAVOperationListener listener);
+                in nsIWebDAVDetailedOperationListener listener);
 
     void moveTo(in nsIWebDAVResourceWithTarget resource,
                 in nsIWebDAVOperationListener listener);

extensions/webdav/src/nsWebDAVService.cpp

@@ -511,7 +511,7 @@ nsWebDAVService::Put(nsIWebDAVResourceWithData *resource,
 
 NS_IMETHODIMP
 nsWebDAVService::Remove(nsIWebDAVResource *resource,
-                        nsIWebDAVOperationListener *listener)
+                        nsIWebDAVDetailedOperationListener *listener)
 {
     nsCOMPtr<nsIHttpChannel> channel;
     nsresult rv = ChannelFromResource(resource, getter_AddRefs(channel));