Added uma for pin unlock set up.

chrome/test/data/webui/settings/fake_quick_unlock_uma.js

+// Copyright 2016 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 Fake implementation of chrome histogram recording for testing.
+ */
+cr.define('settings', function() {
+  /**
+   * Fake of the chrome.quickUnlockUma.
+   * @constructor
+   */
+  function FakeQuickUnlockUma() {
+    this.histogram = {};
+    for (var key in LockScreenProgress)
+      this.histogram[LockScreenProgress[key]] = 0;
+  }
+
+  FakeQuickUnlockUma.prototype = {
+    /**
+     * Update the histgoram at |key| by one.
+     * @param {LockScreenProgress} key
+     */
+    recordProgress: function(key) {
+      if (!(key in this.histogram))
+        this.histogram[key] = 0;
+      this.histogram[key]++;
+    },
+
+    /**
+     * Get the value of the uma histogram at |key|.
+     * @param {LockScreenProgress} key
+     * @return {Number}
+     */
+    getHistogramValue: function(key) {
+      return this.histogram[key];
+    }
+  };
+
+  return {FakeQuickUnlockUma: FakeQuickUnlockUma};
+});