Remove prerender::Config::https_allowed.

chrome/browser/prerender/prerender_config.h

 // Copyright (c) 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_PRERENDER_PRERENDER_CONFIG_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_CONFIG_H_
 
 #include <string>
 
 #include "base/time/time.h"
@@ skipping 28 matching lines @@
   base::TimeDelta time_to_live;
 
   // After a prerender has been abandoned by the user navigating away from the
   // source page or otherwise mooting the launcher, how long until the prerender
   // should be removed. This exists because a prerendered page is often
   // navigated to through a chain of redirects; removing the prerender when the
   // link element is removed because of navigation would destroy prerenders just
   // before they were going to be used.
   base::TimeDelta abandon_time_to_live;
 
-  // Is https allowed?
-  bool https_allowed;
-
   // The default tab bounds used as the prerenderer tab size when the active tab
   // cannot be accessed.
   gfx::Rect default_tab_bounds;
 
   // User agent being used as an override for the WebContents.
   std::string user_agent_override;
 
   // Is the user agent being overridden for this NavigationEntry?
   bool is_overriding_user_agent;
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_CONFIG_H_