Add item and document sequence numbers to FrameNavigationEntry.

content/browser/frame_host/navigation_entry_impl.h

Index: content/browser/frame_host/navigation_entry_impl.h
diff --git a/content/browser/frame_host/navigation_entry_impl.h b/content/browser/frame_host/navigation_entry_impl.h
index a5ce6fcf9f11657bf8155682a84d3f81c8953156..63fa5e0642eb2d6b190d239333a79d33c1b6cfd5 100644
--- a/content/browser/frame_host/navigation_entry_impl.h
+++ b/content/browser/frame_host/navigation_entry_impl.h
@@ -172,14 +172,16 @@ class CONTENT_EXPORT NavigationEntryImpl
   // 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;