Move the offline URL trimming to GetFormattedURL.

ios/chrome/browser/reading_list/offline_url_utils.h

 // Copyright 2016 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 IOS_CHROME_BROWSER_READING_LIST_OFFLINE_URL_UTILS_H_
 #define IOS_CHROME_BROWSER_READING_LIST_OFFLINE_URL_UTILS_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
+#include "base/strings/string16.h"
 #include "url/gurl.h"
 
 namespace reading_list {
 
 // The distilled URL chrome://offline/... that will load the file at |path|.
 GURL DistilledURLForPath(const base::FilePath& path, const GURL& virtual_url);
 
 // If |distilled_url| has a query "virtualURL" query params that is a URL,
 // returns it. If not, return |distilled_url|
 GURL VirtualURLForDistilledURL(const GURL& distilled_url);
 
 // The file URL pointing to the local file to load to display |distilled_url|.
 // If |resources_root_url| is not nullptr, it is set to a file URL to the
 // directory conatining all the resources needed by |distilled_url|.
 // |offline_path| is the root path to the directory containing offline files.
 GURL FileURLForDistilledURL(const GURL& distilled_url,
                             const base::FilePath& offline_path,
                             GURL* resources_root_url);
 
 // Returns whether the URL points to a chrome offline URL.
 bool IsOfflineURL(const GURL& url);
 
+// Strips scheme from the original URL of the offline page. This is meant to be
+// used by UI.
+// If |removed_chars| is non-NULL, it is set to the number of chars that have
+// been removed at the begining of |online_url|.
+base::string16 StripSchemeFromOnlineURL(const base::string16& online_url,
+                                        size_t* removed_chars);
+
 }  // namespace reading_list
 
 #endif  // IOS_CHROME_BROWSER_READING_LIST_OFFLINE_URL_UTILS_H_