InstantExtended: Transient naventry for preview.

chrome/browser/instant/instant_loader.h

 // Copyright 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 CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_delegate.h"
 
 class GURL;
 class Profile;
 
 namespace content {
 struct OpenURLParams;
+class NavigationEntry;
 class WebContents;
 }
 
 // InstantLoader is used to create and maintain a WebContents where we can
 // preload a page into. It is used by InstantOverlay and InstantNTP to
 // preload an Instant page.
 class InstantLoader : public content::NotificationObserver,
                       public content::WebContentsDelegate,
                       public CoreTabHelperDelegate {
  public:
@@ skipping 45 matching lines @@
   content::WebContents* contents() const { return contents_.get(); }
 
   // Replaces the contents held with |contents|. Any existing contents is
   // deleted. The expiration timer is not restarted.
   void SetContents(scoped_ptr<content::WebContents> contents);
 
   // Releases the contents currently held. Must only be called if contents() is
   // not NULL.
   scoped_ptr<content::WebContents> ReleaseContents() WARN_UNUSED_RESULT;
 
+  // Returns the initial navigation entry for the most recently loaded URL.
+  const content::NavigationEntry* base_navigation_entry() {
+    return base_navigation_entry_.get();
+  }
+
  private:
   // Overridden from content::NotificationObserver:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Overridden from CoreTabHelperDelegate:
   virtual void SwapTabContents(content::WebContents* old_contents,
                                content::WebContents* new_contents) OVERRIDE;
 
@@ skipping 17 matching lines @@
 
   Delegate* const delegate_;
   scoped_ptr<content::WebContents> contents_;
 
   // The URL we will be loading.
   GURL instant_url_;
 
   // Called when |stale_page_timer_| fires.
   base::Closure on_stale_callback_;
 
+  // The initial navigation entry for the URL we loaded.
+  scoped_ptr<const content::NavigationEntry> base_navigation_entry_;
+
   // Used to mark when the page is stale.
   base::Timer stale_page_timer_;
 
   // Used to get notifications about renderers.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantLoader);
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_LOADER_H_