Adding local html page used in Instant Extended mode when instant is disabled or unavailable.

chrome/browser/instant/instant_loader.h

Index: chrome/browser/instant/instant_loader.h
diff --git a/chrome/browser/instant/instant_loader.h b/chrome/browser/instant/instant_loader.h
index 618a4fc3a6ea06b86cc607ee7b5884ed967ff37b..185d2ff53e9317c3b7838c66ac3adf826f2e5c61 100644
--- a/chrome/browser/instant/instant_loader.h
+++ b/chrome/browser/instant/instant_loader.h
@@ -86,6 +86,10 @@ class InstantLoader : public InstantClient::Delegate,
   // to the history service had this WebContents not been used for Instant.
   void DidNavigate(const history::HistoryAddPageArgs& add_page_args);
 
+  // Returns true if the loader is using
+  // InstantController::kLocalOmniboxPopupURL as the |instant_url_|.
+  bool IsUsingLocalPreview() const;
+
   // Calls through to methods of the same name on InstantClient.
   void Update(const string16& text,
               size_t selection_start,