Instant Extended: Fallback to local preview if the remote instant page is not ready on user input.

chrome/browser/instant/instant_controller.h

 // Copyright 2012 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 CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 179 matching lines @@
   // ensure that the |loader_| is not already on the stack since it is deleted
   // in this call.
   void CreateLoader(const std::string& instant_url,
                     content::WebContents* active_tab);
 
   // Called when the |loader_| might be stale. If it's actually stale, and the
   // omnibox doesn't have focus, and the preview isn't showing, the |loader_| is
   // deleted and recreated. Else the refresh is skipped.
   void OnStaleLoader();
 
+  // If the |loader_| being used is in fallback mode, it will be switched back
+  // to the remote loader if the loader is not showing and the omnibox does not
+  // have focus.
+  void MaybeSwitchToRemoteLoader();
+
   // If the active tab is an Instant search results page, sets |instant_tab_| to
   // point to it. Else, deletes any existing |instant_tab_|.
   void ResetInstantTab();
 
   // Hide the preview. Also sends an onchange event (with blank query) to the
   // preview, telling it to clear out results for any old queries.
   void HideLoader();
 
   // Like HideLoader(), but doesn't call OnStaleLoader(). Use HideLoader()
   // unless you are going to call loader_.reset() yourself subsequently.
@@ skipping 110 matching lines @@
 
   // Whether to allow the preview to show search suggestions. In general, the
   // preview is allowed to show search suggestions whenever |search_mode_| is
   // MODE_SEARCH_SUGGESTIONS, except in those cases where this is false.
   bool allow_preview_to_show_search_suggestions_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantController);
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_