Create FrameNavigationEntries for the initial blank page in subframes.

content/browser/frame_host/navigation_controller_impl.h

Index: content/browser/frame_host/navigation_controller_impl.h
diff --git a/content/browser/frame_host/navigation_controller_impl.h b/content/browser/frame_host/navigation_controller_impl.h
index ee140453caf43b57cb23fa0b4fb4c14a9945e111..e867d7fadb9df074ea20f6d0339cadad42a8572b 100644
--- a/content/browser/frame_host/navigation_controller_impl.h
+++ b/content/browser/frame_host/navigation_controller_impl.h
@@ -120,11 +120,6 @@ class CONTENT_EXPORT NavigationControllerImpl
   // Return the entry with the given unique id, or null if not found.
   NavigationEntryImpl* GetEntryWithUniqueID(int nav_entry_id) const;
 
-  // Whether the given frame has committed any navigations yet.
-  // This currently only returns true in --site-per-process mode.
-  // TODO(creis): Create FrameNavigationEntries by default so this always works.
-  bool HasCommittedRealLoad(FrameTreeNode* frame_tree_node) const;
-
   NavigationControllerDelegate* delegate() const {
     return delegate_;
   }