Cancel prerender if any of the visited URLs are https.

chrome/browser/prerender/prerender_contents.h

 // Copyright (c) 2011 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_CONTENTS_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 171 matching lines @@
   // Message handlers.
   void OnDidStartProvisionalLoadForFrame(int64 frame_id,
                                          bool main_frame,
                                          const GURL& url);
   void OnDidRedirectProvisionalLoad(int32 page_id,
                                     const GURL& source_url,
                                     const GURL& target_url);
 
   void OnUpdateFavIconURL(int32 page_id, const GURL& icon_url);
 
-  void AddAliasURL(const GURL& url);
+  // Adds an alias URL, for one of the many redirections. Returns whether
+  // the URL is valid.
+  bool AddAliasURL(const GURL& url);
 
   // Remove |this| from the PrerenderManager, set a final status, and
   // delete |this|.
   void Destroy(FinalStatus reason);
 
   // The prerender manager owning this object.
   PrerenderManager* prerender_manager_;
 
   // The host for our HTML content.
   RenderViewHost* render_view_host_;
@@ skipping 37 matching lines @@
   // the time elapsed from initiating a prerender until the time the
   // (potentially only partially) prerendered page is shown to the user.
   base::TimeTicks load_start_time_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderContents);
 };
 
 }  // prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_