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 23b6f0664487bf210ab22de85370803087a5192a..61deeb9c4ec686d8b693c61715dfe65e7794cf15 100644
--- a/chrome/browser/instant/instant_loader.h
+++ b/chrome/browser/instant/instant_loader.h
@@ -86,6 +86,9 @@ 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 loading InstantLoader::kLocalOmniboxPopupURL.
+  bool IsLoadingLocalOmniboxPopupURL() const;

[samarth, 2012/12/13 00:58:21]

How about something like UsingLocalPreview()?  (IsLoading implies this is
checking if we're still loading)

[Shishir, 2012/12/13 22:57:58]

Done.

+
   // Calls through to methods of the same name on InstantClient.
   void Update(const string16& text,
               size_t selection_start,