Do not commit InstantLoader server redirects till the page supports instant.

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 148 matching lines @@
   void SwappedWebContents();
 
   // Invoked by InstantLoader when the preview gains focus, usually due to the
   // user clicking on it.
   void InstantLoaderContentsFocused();
 
   // Invoked by the InstantLoader when its RenderView crashes.
   void InstantLoaderRenderViewGone();
 
   // Invoked by InstantLoader when the instant page is about to navigate.
-  void InstantLoaderAboutToNavigateMainFrame(const GURL& url);
+  void InstantLoaderAboutToNavigateMainFrame(const GURL& url,
+                                             bool is_server_redirect);
 
   // Invoked by the InstantLoader when the instant page wants to navigate to
   // the speicfied URL.
   void NavigateToURL(const GURL& url, content::PageTransition transition);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(InstantTest, OmniboxFocusLoadsInstant);
   FRIEND_TEST_ALL_PREFIXES(InstantTest, NonInstantSearchProvider);
   FRIEND_TEST_ALL_PREFIXES(InstantTest, InstantLoaderRefresh);
 
@@ skipping 141 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_