 - decidePolicyForNavigationAction 
<NSURLRequest URL resources/click-notify-done-in-main.html, main document URL resources/click-notify-done-in-main.html, http method GET> is main frame - yes should open URLs externally - no
 - decidePolicyForNavigationAction 
<NSURLRequest URL notify-done.html, main document URL notify-done.html, http method GET> is main frame - yes should open URLs externally - yes