Create a NavigationEntry for the initial blank page.

content/public/browser/navigation_controller.h

Index: content/public/browser/navigation_controller.h
diff --git a/content/public/browser/navigation_controller.h b/content/public/browser/navigation_controller.h
index c0c18994ad652ca1859c92e10c2cd5d33a5bbf13..3ad7e03a6936c7d3840ee23607de4b7440fa7454 100644
--- a/content/public/browser/navigation_controller.h
+++ b/content/public/browser/navigation_controller.h
@@ -410,10 +410,15 @@ class NavigationController {
   // Continues a repost that brought up a warning.
   virtual void ContinuePendingReload() = 0;
 
-  // Returns true if we are navigating to the URL the tab is opened with.
-  // Returns false after the initial navigation has committed.
+  // Returns true if this is a newly created tab or a cloned tab, which has not
+  // yet committed a real page. Returns false after the initial navigation has
+  // committed.
   virtual bool IsInitialNavigation() const = 0;
 
+  // Returns true if this is a newly created tab (not a clone) that has not yet
+  // committed a real page.
+  virtual bool IsInitialBlankNavigation() const = 0;
+
   // Broadcasts the NOTIFICATION_NAV_ENTRY_CHANGED notification for the given
   // entry. This will keep things in sync like the saved session.
   virtual void NotifyEntryChanged(const NavigationEntry* entry) = 0;