Added uma for pin unlock set up.

chrome/browser/resources/settings/people_page/password_prompt_dialog.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
  *
  * 'settings-password-prompt-dialog' shows a dialog which asks for the user to
  * enter their password. It validates the password is correct. Once the user has
  * entered their account password, the page fires an 'authenticated' event and
@@ skipping 54 matching lines @@
     /**
      * Interface for chrome.quickUnlockPrivate calls. May be overriden by tests.
      * @private
      */
     quickUnlockPrivate_: {
       type: Object,
       value: chrome.quickUnlockPrivate
     },
 
     /**
+     * writeUma_ is a function that handles writing uma stats. It may be
+     * overridden for tests.
+     *
+     * @type {Function}
+     * @private
+     */
+    writeUma_: {
+      type: Object,
+      value: function() { return settings.recordLockScreenProgress; }
+    },
+
+    /**
      * PASSWORD_ACTIVE_DURATION_MS value. May be overridden by tests.
      * @private
      */
     passwordActiveDurationMs_: {
       type: Number,
       value: PASSWORD_ACTIVE_DURATION_MS
     },
   },
 
   /**
    * Open up the dialog. This will wait until the dialog has loaded before
    * opening it.
    */
   open: function() {
     // Wait until the dialog is attached to the DOM before trying to open it.
     var dialog = /** @type {{isConnected: boolean}} */ (this.$.dialog);
     if (!dialog.isConnected) {
       setTimeout(this.open.bind(this));
       return;
     }
 
     if (this.$.dialog.open)
       return;
 
+    this.writeUma_(LockScreenProgress.START_SCREEN_LOCK);
     this.$.dialog.showModal();
   },
 
   /** @private */
   onCancelTap_: function() {
     if (this.$.dialog.open)
       this.$.dialog.close();
   },
 
   /**
@@ skipping 47 matching lines @@
           this.setModes = null;
         }
 
         this.clearAccountPasswordTimeout_ = setTimeout(
           clearSetModes.bind(this), this.passwordActiveDurationMs_);
 
         // Clear stored password state and close the dialog.
         this.password_ = '';
         if (this.$.dialog.open)
           this.$.dialog.close();
+
+        this.writeUma_(LockScreenProgress.ENTER_PASSWORD_CORRECTLY);
       }
     }
 
     this.checkAccountPassword_(onPasswordChecked.bind(this));
   },
 
   /** @private */
   onPasswordChanged_: function() {
     this.passwordInvalid_ = false;
   },
@@ skipping 13 matching lines @@
     this.quickUnlockPrivate_.getActiveModes(function(modes) {
       var credentials =
           /** @type {!Array<string>} */ (Array(modes.length).fill(''));
       this.quickUnlockPrivate_.setModes(
           this.password_, modes, credentials, onCheck);
     }.bind(this));
   }
 });
 
 })();