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

ui/login/account_picker/user_pod_row.js

Index: ui/login/account_picker/user_pod_row.js
diff --git a/ui/login/account_picker/user_pod_row.js b/ui/login/account_picker/user_pod_row.js
index 6828093a94a1f4cfc9d3376d92de2649e0775c57..356a1a61fd814cc8e5a1c72184d5d66be5262431 100644
--- a/ui/login/account_picker/user_pod_row.js
+++ b/ui/login/account_picker/user_pod_row.js
@@ -2005,6 +2005,10 @@ cr.define('login', function() {
     // 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
@@ -2034,14 +2038,17 @@ cr.define('login', function() {
 
     /**
      * 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;
     },
 
     /**
@@ -2372,6 +2379,14 @@ cr.define('login', function() {
     },
 
     /**
+     * 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