Add IsOriginSecure and GURL::SchemeUsesTLS.

content/public/common/origin_util.h

+// Copyright (c) 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_URL_SCHEMES_H_
+#define CONTENT_PUBLIC_COMMON_URL_SCHEMES_H_
+
+#include "content/common/content_export.h"
+
+class GURL;
+
+namespace content {
+
+// Returns true if the origin is secure as defined in
+// https://www.w3.org/TR/powerful-features/#is-origin-trustworthy.
+//
+// The checks are:
+//
+//   * Scheme indicates TLS-using transport
+//   * Scheme indicates origin is local to the client (and, if possible to know,
+//     whether it got to the client via TLS)
+//   * Scheme is a special known secure scheme specific to content::
+CONTENT_EXPORT bool IsOriginSecure(const GURL& url);
+
+}  // namespace content
+
+#endif  // ONTENT_PUBLIC_COMMON_URL_SCHEMES_H_