trivial comment-only patch (s/it's/its/ from bug 458167) to trigger another unittest cycle, to see if linux oranges go away.

git-svn-id: svn://10.0.0.236/trunk@256330 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/docshell/base/nsDocShell.cpp

@@ -6516,7 +6516,7 @@ nsDocShell::CheckLoadingPermissions()
     NS_ENSURE_TRUE(NS_SUCCEEDED(rv) && subjPrincipal, rv);
 
     // Check if the caller is from the same origin as this docshell,
-    // or any of it's ancestors.
+    // or any of its ancestors.
     nsCOMPtr<nsIDocShellTreeItem> item(this);
     do {
         nsCOMPtr<nsIScriptGlobalObject> sgo(do_GetInterface(item));