InstantExtended: Transient naventry for preview.

chrome/browser/instant/instant_overlay.h

 // Copyright 2013 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 CHROME_BROWSER_INSTANT_INSTANT_OVERLAY_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_OVERLAY_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 39 matching lines @@
   // Returns whether the underlying contents is stale (i.e. was loaded too long
   // ago).
   bool is_stale() const { return is_stale_; }
 
   // Returns true if the mouse or a touch pointer is down due to activating the
   // preview contents.
   bool is_pointer_down_from_activate() const {
     return is_pointer_down_from_activate_;
   }
 
+  // Returns the initial navigation entry for the most recently loaded URL.
+  const content::NavigationEntry* base_navigation_entry() {
+    return loader_.base_navigation_entry();
+  }
+
   // Returns info about the last navigation by the Instant page. If the page
   // hasn't navigated since the last Update(), the URL is empty.
   const history::HistoryAddPageArgs& last_navigation() const {
     return last_navigation_;
   }
 
   // Called by the history tab helper with information that it would have added
   // to the history service had this WebContents not been used for Instant.
   void DidNavigate(const history::HistoryAddPageArgs& add_page_args);
 
@@ skipping 38 matching lines @@
   InstantLoader loader_;
   const std::string instant_url_;
   bool is_stale_;
   bool is_pointer_down_from_activate_;
   history::HistoryAddPageArgs last_navigation_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantOverlay);
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_OVERLAY_H_