Move the offline URL trimming to GetFormattedURL.

ios/chrome/browser/reading_list/offline_url_utils.h

Index: ios/chrome/browser/reading_list/offline_url_utils.h
diff --git a/ios/chrome/browser/reading_list/offline_url_utils.h b/ios/chrome/browser/reading_list/offline_url_utils.h
index 479b75ca4cf627fd2320d5bf3ccddbf953a9da48..19048405623b71e3a8a76c257ed9c018d44dc67e 100644
--- a/ios/chrome/browser/reading_list/offline_url_utils.h
+++ b/ios/chrome/browser/reading_list/offline_url_utils.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/files/file_path.h"
+#include "base/strings/string16.h"
 #include "url/gurl.h"
 
 namespace reading_list {
@@ -30,6 +31,13 @@ GURL FileURLForDistilledURL(const GURL& distilled_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_