Added URL attribute to nsIFile (why: because (a) needs to vary for different implementations, and (b) need to factor out of necko for installer). Not implemented yet.

xpcom/io/nsLocalFileOS2.cpp

@@ -2088,6 +2088,45 @@ nsLocalFile::GetDirectoryEntries(nsISimpleEnumerator * *entries)
     return NS_OK;
 }
 
+NS_IMETHODIMP nsLocalFile::GetURL(char * *aURL)
+{
+    nsresult rv;
+    char* ePath = (char*) nsMemory::Clone(mWorkingPath, strlen(mWorkingPath)+1);
+    if (ePath == nsnull)
+        return NS_ERROR_OUT_OF_MEMORY;
+    // Replace \ with / to convert to an url
+    char* s = ePath;
+    while (*s) {
+        if (*s == '\\')
+            *s = '/';
+        s++;
+    }
+    // Escape the path with the directory mask
+    nsCAutoString tmp = ePath;
+    tmp.ReplaceChar(":", '|');
+    nsCAutoString escPath = "file://";
+	escPath += tmp;
+//    rv = nsURLEscape(ePath,nsIIOService::url_Directory + nsIIOService::url_Forced, escPath);
+//    if (NS_SUCCEEDED(rv)) {
+        PRBool dir;
+        rv = IsDirectory(&dir);
+        if (NS_SUCCEEDED(rv) && dir && escPath[escPath.Length() - 1] != '/') {
+            // make sure we have a trailing slash
+            escPath += "/";
+        }
+        *aURL = escPath.ToNewCString();
+        if (*aURL == nsnull)
+            return NS_ERROR_OUT_OF_MEMORY;
+//    }
+
+    return rv;
+}
+
+NS_IMETHODIMP nsLocalFile::SetURL(const char * aURL)
+{
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
 NS_IMETHODIMP
 nsLocalFile::GetPersistentDescriptor(char * *aPersistentDescriptor)
 {