Re-enable storage for Suborigins.

content/public/common/origin_util.h

 // Copyright 2015 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 CONTENT_PUBLIC_COMMON_ORIGIN_UTIL_H_
 #define CONTENT_PUBLIC_COMMON_ORIGIN_UTIL_H_
 
+#include <string>
+
 #include "content/common/content_export.h"
 
 class GURL;
 
 namespace content {
 
 // Returns true if the origin is trustworthy: that is, if its contents can be
 // said to have been transferred to the browser in a way that a network attacker
 // cannot tamper with or observe.
 //
 // See https://www.w3.org/TR/powerful-features/#is-origin-trustworthy.
 bool CONTENT_EXPORT IsOriginSecure(const GURL& url);
 
 // Returns true if the origin can register a service worker.  Scheme must be
 // http (localhost only), https, or a custom-set secure scheme.
 bool CONTENT_EXPORT OriginCanAccessServiceWorkers(const GURL& url);
 
 // Resets the internal schemes/origins whitelist. Used only for testing.
 void CONTENT_EXPORT ResetSchemesAndOriginsWhitelistForTesting();
 
+// Utility functions for extracting Suborigin information from a URL that a
+// Suborigin has been serialized into. See
+// https://w3c.github.io/webappsec-suborigins/ for more information on
+// Suborigins.
+//
+// Returns true if the url has a serialized Suborigin in the host. Otherwise,
+// returns false.
+bool CONTENT_EXPORT HasSuborigin(const GURL& url);
+
+// If the host in the URL has a Suborigin serialized into it, returns the name.
+// Otherwise, returns the empty string.
+std::string CONTENT_EXPORT SuboriginFromUrl(const GURL& url);
+
+// If the URL has a suborigin serialized into it, returns the same URL with the
+// suborigin stripped. Otherwise, returns the original URL unchanged.
+//
+// For example, if given the URL https-so://foobar.example.com, the returned URL
+// would be https://example.com. If given the URL https://foobar.com (no
+// suborigin), the returned URL would be https://foobar.com.
+GURL CONTENT_EXPORT StripSuboriginFromUrl(const GURL& url);
+
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_ORIGIN_UTIL_H_