Enable 3rd party support for Security Keys.

chrome/browser/resources/cryptotoken/etld.js

Index: chrome/browser/resources/cryptotoken/etld.js
diff --git a/chrome/browser/resources/cryptotoken/etld.js b/chrome/browser/resources/cryptotoken/etld.js
new file mode 100644
index 0000000000000000000000000000000000000000..f9c0a74002b7e99aa1346e23cffab671c7dce032
--- /dev/null
+++ b/chrome/browser/resources/cryptotoken/etld.js
@@ -0,0 +1,92 @@
+// Copyright 2014 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.
+
+/**
+ * @fileoverview Fetches the extended TLD + 1 of an origin.
+ */
+'use strict';
+
+/**
+ * A class to fetch the extended TLD + 1 of an origin.
+ * @param {!TextFetcher} fetcher A URL fetcher.
+ * @param {boolean=} opt_cache Whether to cache fetched results for the
+ *     lifetime of this object.
+ * @constructor
+ */
+function EffectiveTldFetcher(fetcher, opt_cache) {
+  /** @private {(!Array.<string>)|undefined} */
+  this.eTlds_ = ETLD_NAMES_LIST;
+}
+
+/** @private {!Array.<string>} */
+EffectiveTldFetcher.effectiveTldListUrls_ = [];
+
+/**
+ * A fixed list of known TLDs.
+ * @private {!Array.<string>}
+ */
+EffectiveTldFetcher.fixed_tld_list_ = [];
+
+/**
+ * Sets a fixed list of known TLDs. This list is not canonical: if an origin
+ * is not found to be in this list, a canonical list is fetched from
+ * EffectiveTldFetcher.effectiveTldListUrls_.
+ * @param {!Array.<string>} tlds The list of known TLDs.
+ */
+EffectiveTldFetcher.setFixedTldList = function(tlds) {
+  EffectiveTldFetcher.fixed_tld_list_ = tlds;
+};
+
+/**
+ * @param {string} origin The origin.
+ * @return {Promise.<?string>} A promise for the eTLD+1 of origin, or null if it
+ *     doesn't have one (e.g. the origin is invalid.)
+ */
+EffectiveTldFetcher.prototype.getEffectiveTldPlusOne = function(origin) {
+  var etld = this.getEffectiveTldPlusOne_(origin,
+    EffectiveTldFetcher.fixed_tld_list_);
+  if (etld) {
+    return Promise.resolve(/** @type {?string} */(etld));
+  }
+  return Promise.resolve(this.getEffectiveTldPlusOne_(origin, this.eTlds_));
+};
+
+/**
+ * @param {string} origin The origin.
+ * @param {!Array.<string>} eTlds The list of extended TLDs.
+ * @return {?string} The eTLD + 1 of the origin, or null if it doesn't have one
+ *     (e.g. is invalid.)
+ * @private
+ */
+EffectiveTldFetcher.prototype.getEffectiveTldPlusOne_ =
+    function(origin, eTlds) {
+  var prev = '';
+  var host;
+  if (origin.indexOf('http://') == 0) {
+    host = origin.substring(7);
+  } else if (origin.indexOf('https://') == 0) {
+    host = origin.substring(8);
+  } else {
+    host = origin;
+  }
+  if (host.indexOf(':') != -1) {
+    host = host.substring(0, host.indexOf(':'));
+  }
+  if (host == 'localhost') {
+    return host;
+  }
+  // Loop over each possible subdomain, from longest to shortest, in order to
+  // find the longest matching eTLD first.
+  var next = host;
+  while (true) {
+    var dot = next.indexOf('.');
+    if (dot == -1) return null;
+    prev = next;
+    next = next.substring(dot + 1);
+    if (eTlds.indexOf(next) >= 0) {
+      return prev;
+    }
+  }
+};
+