Code Refactor and making function static in frame_navigation_state.

chrome/browser/extensions/api/web_navigation/web_navigation_api.h

Index: chrome/browser/extensions/api/web_navigation/web_navigation_api.h
diff --git a/chrome/browser/extensions/api/web_navigation/web_navigation_api.h b/chrome/browser/extensions/api/web_navigation/web_navigation_api.h
index b2ab0c25b91e5004d7374dad684c8b551b934589..5eed9022bff79e1f6ad4d0913c865c2188c1b989 100644
--- a/chrome/browser/extensions/api/web_navigation/web_navigation_api.h
+++ b/chrome/browser/extensions/api/web_navigation/web_navigation_api.h
@@ -84,6 +84,9 @@ class WebNavigationTabObserver
   explicit WebNavigationTabObserver(content::WebContents* web_contents);
   friend class content::WebContentsUserData<WebNavigationTabObserver>;
 
+  void DispatchErrorToHelper(content::RenderFrameHost* render_frame_host,
+                             int error_code);
+
   // True if the transition and target url correspond to a reference fragment
   // navigation.
   bool IsReferenceFragmentNavigation(content::RenderFrameHost* frame_host,