Submit button added to user pod.

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 daa92b6f23d8385c220ba387abc0b2249136af38..c10b989d5e4edb26350ebf79409ed6a3b7b3e1f5 100644
--- a/ui/login/account_picker/user_pod_row.js
+++ b/ui/login/account_picker/user_pod_row.js
@@ -753,6 +753,10 @@ cr.define('login', function() {
           this.parentNode.handleKeyDown.bind(this.parentNode));
       this.passwordElement.addEventListener('keypress',
           this.handlePasswordKeyPress_.bind(this));
+      this.passwordElement.addEventListener('input',
+          this.handlePasswordInput_.bind(this));
+      this.submitButton.addEventListener('click',
+          this.handleSubmitButtonClick_.bind(this));
 
       this.imageElement.addEventListener('load',
           this.parentNode.handlePodImageLoad.bind(this.parentNode, this));
@@ -762,6 +766,17 @@ cr.define('login', function() {
       this.setAuthType(initialAuthType, null);
 
       this.userClickAuthAllowed_ = false;
+
+      // Lazy load the assets need for the polymer submit button.

[jdufault, 2016/08/30 18:21:58]

This is going to always load the PIN keyboard. This means we can eliminate /
refactor the PIN keyboard loading code so it doesn't use ResourceLoader anymore.

[sammiequon, 2016/08/30 19:44:35]

As per our offline chat we will keep this seperate.

+      if (cr.ui.login.ResourceLoader.alreadyLoadedAssets('userpod-polymer'))

[jdufault, 2016/08/30 18:21:58]

'custom-elements'

[sammiequon, 2016/08/30 19:44:35]

As per our offline chat we will keep this seperate.

+          return;
+
+      cr.ui.login.ResourceLoader.registerAssets({
+          id: 'userpod-polymer',

[jdufault, 2016/08/30 18:21:58]

'custom-elements'

[sammiequon, 2016/08/30 19:44:35]

As per our offline chat we will keep this seperate.

+          html: [{ url: 'chrome://oobe/custom_elements.html'}]
+       });
+      cr.ui.login.ResourceLoader.loadAssetsOnIdle('userpod-polymer',
+          function() {});

[jdufault, 2016/08/30 18:21:58]

emit function

[sammiequon, 2016/08/30 19:44:35]

Do we need to still emit function?

     },
 
     /**
@@ -789,6 +804,24 @@ cr.define('login', function() {
     },
 
     /**
+     * Handles input changes on password input.
+     * @param {Event} e Input Event object.
+     * @private
+     */
+    handlePasswordInput_: function(e) {
+      this.submitButton.disabled = this.passwordElement.value.length <= 0;
+      this.setErrorDisplay(false);
+    },
+
+    /**
+     * Handles a click event on submit button.
+     * @param {Event} e Click event.
+     */
+    handleSubmitButtonClick_: function(e) {
+      this.parentNode.setActivatedPod(this, e);
+    },
+
+    /**
      * Top edge margin number of pixels.
      * @type {?number}
      */
@@ -866,6 +899,14 @@ cr.define('login', function() {
     },
 
     /**
+     * Gets submit button.
+     * @type {!HTMLInputElement}
+     */
+    get submitButton() {
+      return this.querySelector('.submit-button');
+    },
+
+    /**
      * Gets the password label, which is used to show a message where the
      * password field is normally.
      * @type {!HTMLInputElement}
@@ -1095,6 +1136,10 @@ cr.define('login', function() {
       return this.pinKeyboard && this.pinKeyboard.offsetHeight > 0;
     },
 
+    setErrorDisplay: function(visible) {
+      this.submitButton.classList.toggle('error-shown', visible);
+    },
+
     toggleTransitions: function(enable) {
       this.classList.toggle('flying-pin-pod', enable);
     },
@@ -2583,11 +2628,28 @@ cr.define('login', function() {
       userPod.initialize();
     },
 
+    /**
+     * Enables or disables transitions on the user pod.
+     * @param {boolean} enable
+     */
     togglePinTransitions: function(enable) {
       for (var i = 0; i < this.pods.length; ++i)
         this.pods[i].toggleTransitions(enable);
     },
 
+    /**
+     * Performs visual changes on the user pod if there is an error.
+     * @param {boolean} visible Whether to show or hide the display.
+     */
+    setFocusedPodErrorDisplay: function(visible) {
+      if (this.focusedPod_)
+        this.focusedPod_.setErrorDisplay(visible);
+    },
+
+    /**
+     * Shows or hides the pin keyboard for the current focused pod.
+     * @param {boolean} visible
+     */
     setFocusedPodPinVisibility: function(visible) {
       if (this.focusedPod_ && this.focusedPod_.user.showPin)
         this.focusedPod_.setPinVisibility(visible);