Create a NavigationEntry for the initial blank page.

content/public/browser/navigation_controller.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_NAVIGATION_CONTROLLER_H_
 #define CONTENT_PUBLIC_BROWSER_NAVIGATION_CONTROLLER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 392 matching lines @@
 
   // Request a reload to happen when activated. This can be used when a renderer
   // backing a background tab is killed by the system on Android or ChromeOS.
   virtual void SetNeedsReload() = 0;
 
   // Cancels a repost that brought up a warning.
   virtual void CancelPendingReload() = 0;
   // 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;
 
   // Copies the navigation state from the given controller to this one. This
   // one should be empty (just created).
   virtual void CopyStateFrom(const NavigationController& source) = 0;
 
   // A variant of CopyStateFrom. Removes all entries from this except the last
   // committed entry, and inserts all entries from |source| before and including
@@ skipping 40 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class NavigationControllerImpl;
   NavigationController() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NAVIGATION_CONTROLLER_H_