Add IsOriginSecure and GURL::SchemeUsesTLS.

chrome/common/origin_util.h

Index: chrome/common/origin_util.h
diff --git a/chrome/common/origin_util.h b/chrome/common/origin_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..2b8cd5e90d782061940ce60e555804fab7970167
--- /dev/null
+++ b/chrome/common/origin_util.h
@@ -0,0 +1,17 @@
+// 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 CHROME_COMMON_ORIGIN_UTIL_H_
+#define CHROME_COMMON_ORIGIN_UTIL_H_
+
+class GURL;
+
+// 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 IsOriginSecure(const GURL& url);
+
+#endif  // CHROME_COMMON_ORIGIN_UTIL_H_