Remove WebContents::IsActiveEntry from Instant Extended and from WebContents.

chrome/renderer/searchbox/searchbox.h

Index: chrome/renderer/searchbox/searchbox.h
diff --git a/chrome/renderer/searchbox/searchbox.h b/chrome/renderer/searchbox/searchbox.h
index f294d82d8f60c601d810e2fd7ef4dc21ef1344be..fd146a020496d35a90e877b23c5f2479b40dd8a8 100644
--- a/chrome/renderer/searchbox/searchbox.h
+++ b/chrome/renderer/searchbox/searchbox.h
@@ -116,6 +116,7 @@ class SearchBox : public content::RenderViewObserver,
   // Overridden from content::RenderViewObserver:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
+  void OnSetPageSequenceNumber(int page_seq_no);
   void OnChromeIdentityCheckResult(const base::string16& identity,
                                    bool identity_match);
   void OnDetermineIfPageSupportsInstant();
@@ -141,6 +142,7 @@ class SearchBox : public content::RenderViewObserver,
   // Returns the URL of the Most Visited item specified by the |item_id|.
   GURL GetURLForMostVisitedItem(InstantRestrictedID item_id) const;
 
+  int page_seq_no_;
   bool app_launcher_enabled_;
   bool is_focused_;
   bool is_input_in_progress_;