Single pod autofocus disabled for touch view mode. Delegate class created for ash interactions.

ui/login/account_picker/user_pod_row.js

 // 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 User pod row implementation.
  */
 
 cr.define('login', function() {
   /**
@@ skipping 1987 matching lines @@
 
     // Array of apps that are shown in addition to other user pods.
     apps_: [],
 
     // True to show app pods along with user pods.
     shouldShowApps_: true,
 
     // Array of users that are shown (public/supervised/regular).
     users_: [],
 
+    // If we're disabling single pod autofocus for Touch View.
+    touchViewSinglePodExperimentOn_: true,
+
+
     /** @override */
     decorate: function() {
       // Event listeners that are installed for the time period during which
       // the element is visible.
       this.listeners_ = {
         focus: [this.handleFocus_.bind(this), true /* useCapture */],
         click: [this.handleClick_.bind(this), true],
         mousemove: [this.handleMouseMove_.bind(this), false],
         keydown: [this.handleKeyDown.bind(this), false]
       };
 
       var isDesktopUserManager = Oobe.getInstance().displayType ==
           DISPLAY_TYPE.DESKTOP_USER_MANAGER;
       this.userPodHeight_ = isDesktopUserManager ? DESKTOP_POD_HEIGHT :
                                                    CROS_POD_HEIGHT;
       // Same for Chrome OS and desktop.
       this.userPodWidth_ = POD_WIDTH;
     },
 
     /**
      * Returns all the pods in this pod row.
      * @type {NodeList}
      */
     get pods() {
       return Array.prototype.slice.call(this.children);
     },
 
     /**
      * Return true if user pod row has only single user pod in it, which should
-     * always be focused.
+     * always be focused except desktop and touch view modes.
      * @type {boolean}
      */
     get alwaysFocusSinglePod() {
       var isDesktopUserManager = Oobe.getInstance().displayType ==
           DISPLAY_TYPE.DESKTOP_USER_MANAGER;
 
-      return isDesktopUserManager ? false : this.children.length == 1;
+      return (isDesktopUserManager ||
+              (this.touchViewSinglePodExperimentOn_ &&
+               this.touchViewEnabled_)) ?
+          false : this.children.length == 1;
     },
 
     /**
      * Returns pod with the given app id.
      * @param {!string} app_id Application id to be matched.
      * @return {Object} Pod with the given app id. null if pod hasn't been
      *     found.
      */
     getPodWithAppId_: function(app_id) {
       for (var i = 0, pod; pod = this.pods[i]; ++i) {
@@ skipping 310 matching lines @@
       var pod = this.getPodWithUsername_(username);
       if (pod == null) {
         console.error('Unable to set auth type for ' + username +
                       ': user pod not found.');
         return;
       }
       pod.setAuthType(authType, value);
     },
 
     /**
+     * Sets the state of touch view mode.
+     * @param {boolean} isTouchViewEnabled true if the mode is on.
+     */
+    setTouchViewState: function(isTouchViewEnabled) {
+      this.touchViewEnabled_ = isTouchViewEnabled;
+    },
+
+    /**
      * Updates the display name shown on a public session pod.
      * @param {string} userID The user ID of the public session
      * @param {string} displayName The new display name
      */
     setPublicSessionDisplayName: function(userID, displayName) {
       var pod = this.getPodWithUsername_(userID);
       if (pod != null)
         pod.setDisplayName(displayName);
     },
 
@@ skipping 602 matching lines @@
        if (pod && pod.multiProfilesPolicyApplied) {
          pod.userTypeBubbleElement.classList.remove('bubble-shown');
        }
      }
   };
 
   return {
     PodRow: PodRow
   };
 });