Fix Self-Referencing OOPIF Infinite Loop

content/browser/frame_host/navigation_handle_impl.h

Index: content/browser/frame_host/navigation_handle_impl.h
diff --git a/content/browser/frame_host/navigation_handle_impl.h b/content/browser/frame_host/navigation_handle_impl.h
index 19b6871a0dd725a5d5ee74355f97b54f3b8e7f81..9d0c86c0949951e4cb4b68576a1de742ab37951a 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -353,6 +353,11 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   // Populates |throttles_| with the throttles for this navigation.
   void RegisterNavigationThrottles();
 
+  // Checks for attempts to navigate to a page that is already referenced more
+  // than once in the frame's ancestors.  This is a helper function used by
+  // WillStartRequest and WillRedirectRequest to prevent the navigation.
+  bool IsSelfReferentialURL();
+
   // See NavigationHandle for a description of those member variables.
   GURL url_;
   scoped_refptr<SiteInstance> starting_site_instance_;