Make ContentSettingsObserver security checks work with OOPIF.

content/public/test/browser_test_utils.h

Index: content/public/test/browser_test_utils.h
diff --git a/content/public/test/browser_test_utils.h b/content/public/test/browser_test_utils.h
index 60b19c730c72be568e0aeb11a267ce9ec551833f..1788195af0c8c93b8d854305c57bdb4883da05dc 100644
--- a/content/public/test/browser_test_utils.h
+++ b/content/public/test/browser_test_utils.h
@@ -56,6 +56,13 @@ class MessageLoopRunner;
 class RenderViewHost;
 class WebContents;
 
+// Navigate a frame with ID |iframe_id| to |url|, blocking until the navigation
+// finishes.  Uses a renderer-initiated navigation from script code in the
+// main frame.
+bool NavigateIframeToURL(WebContents* web_contents,
+                         std::string iframe_id,
+                         const GURL& url);
+
 // Generate a URL for a file path including a query string.
 GURL GetFileUrlWithQuery(const base::FilePath& path,
                          const std::string& query_string);