Solidify Entry discarding logic (NavigationHandle keeps its ID)

content/public/browser/navigation_handle.cc

Index: content/public/browser/navigation_handle.cc
diff --git a/content/public/browser/navigation_handle.cc b/content/public/browser/navigation_handle.cc
index 4926947a2e926cde7b3f25ea96bc20ae22680377..33c402fb787248480a7d486360525d1967fb22e6 100644
--- a/content/public/browser/navigation_handle.cc
+++ b/content/public/browser/navigation_handle.cc
@@ -27,7 +27,7 @@ scoped_ptr<NavigationHandle> NavigationHandle::CreateNavigationHandleForTesting(
   scoped_ptr<NavigationHandleImpl> handle_impl = NavigationHandleImpl::Create(
       url,
       static_cast<RenderFrameHostImpl*>(render_frame_host)->frame_tree_node(),
-      base::TimeTicks::Now());
+      base::TimeTicks::Now(), nullptr);
   return scoped_ptr<NavigationHandle>(std::move(handle_impl));
 }