Add item and document sequence numbers to FrameNavigationEntry.

content/browser/frame_host/navigation_entry_impl.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 CONTENT_BROWSER_FRAME_HOST_NAVIGATION_ENTRY_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_ENTRY_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 154 matching lines @@
     return frame_tree_.get();
   }
 
   // Finds the TreeNode associated with |frame_tree_node_id| to add or update
   // its FrameNavigationEntry.  A new FrameNavigationEntry is added if none
   // exists, or else the existing one (which might be shared with other
   // NavigationEntries) is updated with the given parameters.
   // Does nothing if there is no entry already and |url| is about:blank, since
   // that does not count as a real commit.
   void AddOrUpdateFrameEntry(FrameTreeNode* frame_tree_node,
+                             int64 item_sequence_number,
+                             int64 document_sequence_number,
                              SiteInstanceImpl* site_instance,
                              const GURL& url,
                              const Referrer& referrer,
                              const PageState& page_state);
 
-  // Returns whether this entry has a FrameNavigationEntry for the given
-  // |frame_tree_node|.
-  bool HasFrameEntry(FrameTreeNode* frame_tree_node) const;
+  // Returns the FrameNavigationEntry corresponding to |frame_tree_node|, if
+  // there is one in this NavigationEntry.
+  FrameNavigationEntry* GetFrameEntry(FrameTreeNode* frame_tree_node) const;
 
   void set_unique_id(int unique_id) {
     unique_id_ = unique_id;
   }
 
   // The SiteInstance represents which pages must share processes. This is a
   // reference counted pointer to a shared SiteInstance.
   //
   // Note that the SiteInstance should usually not be changed after it is set,
   // but this may happen if the NavigationEntry was cloned and needs to use a
@@ skipping 264 matching lines @@
   // persisted, unless specific data is taken out/put back in at save/restore
   // time (see TabNavigation for an example of this).
   std::map<std::string, base::string16> extra_data_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationEntryImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_ENTRY_IMPL_H_