Submit button incompatiable with desktop chrome.

ui/login/account_picker/user_pod_template.html

 <dom-module id="user-pod-template-shared-styles">
   <template>
     <link rel="stylesheet" href="user_pod_template.css">
   </template>
 </dom-module>
 
 <style is="custom-style" include="user-pod-template-shared-styles"></style>
 
 <iron-iconset-svg name="user-pod" size="24">
   <svg>
@@ skipping 32 matching lines @@
       </div>
     </div>
     <div class="auth-container">
       <!-- Password Authentication -->
       <div class="password-entry-container">
         <div class="password-container">
           <input type="password" class="password"
                  i18n-values="placeholder:passwordHint">
         </div>
         <div class="capslock-hint-container">
+<if expr="chromeos">

[jdufault, 2016/09/08 22:28:59]

Should this be cros only? It looks like we have had the icon on desktop for a
few years.

If this should be cros only, then the entire capslock-hint-container should
probably be disabled.

[xiyuan, 2016/09/08 22:36:29]

We probably have the load error since the code is ported to desktop chrome.
Don't think the caps lock feature is used on desktop chrome. So the whole
container can probably go.

[sammiequon, 2016/09/09 16:06:35]

The caps lock feature is still inside the password box if caps lock is
activated, though there is already a caps lock indicator on the bottom right. 

           <img class="capslock-hint"
                src="chrome://theme/IDR_LOGIN_PASSWORD_CAPS_LOCK" alt>
+</if>
         </div>
+<if expr="chromeos">
         <paper-icon-button class="submit-button" disabled
                            icon="user-pod:arrow-forward">
         </paper-icon-button>
+</if>
       </div>
       <!-- User Click Authentication -->
       <div class="password-label"></div>
       <div class="signin-transition-container">
         <span class="signing-in-label" i18n-content="signingIn"></span>
         <span class="animated-ellipsis-component0">.</span>
         <span class="animated-ellipsis-component1">.</span>
         <span class="animated-ellipsis-component2">.</span>
       </div>
       <div class="custom-icon-container" hidden></div>
@@ skipping 119 matching lines @@
              i18n-content="publicSessionLanguageAndInput"></a>
         </div>
         <button class="enter-button"
                 i18n-content="publicAccountEnter"
                 i18n-values="aria-label:publicAccountEnterAccessibleName">
         </button>
       </div>
     </div>
   </div>
 </div>