Submit button does not show up on md-settings anymore.

chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.html

Index: chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.html
diff --git a/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.html b/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.html
index eed3719c2c82ad2624acbd42ce693e2d6cad6339..e4d31f183a7e35dccd449c79d6b42e3aee8c3ad1 100644
--- a/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.html
+++ b/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.html
@@ -55,6 +55,10 @@
         position: relative;
       }
 
+      .digit-button.submit-button.submit-button-hidden {
+        display: none;
+      }
+
       .digit-button .icon-container {
         background: var(--paper-grey-400);
         border-radius: 100px;
@@ -114,6 +118,13 @@
         width: 180px;
       }
 
+      #pin-input.submit-button-hidden {
+        border-bottom: 2px;
+        border-bottom-style: solid;
+        text-align: center;
+        width: 230px;
+      }
+
       #pin-input[type=number]::-webkit-inner-spin-button,
       #pin-input[type=number]::-webkit-outer-spin-button {
         -webkit-appearance: none;
@@ -131,11 +142,13 @@
       <div id="container-constrained-width">
         <div class="row horizontal-center">
           <input id="pin-input" type="[[computeInputType_(enablePassword)]]"
-                 class$="[[computeInputClass_(value)]]"
+                 class$="[[computeInputClass_(value)]]
+                        [[computeSubmitHiddenClass_(enableSubmitButton)]]"

[jdufault, 2016/07/21 23:36:36]

nit: align vertically so that the [[ line up.

[sammiequon, 2016/07/29 18:57:38]

Done.

                  placeholder="[[computeInputPlaceholder_(enablePassword)]]"
                  value="{{value::input}}"
                  on-keydown="onInputKeyDown_"></input>
-          <paper-button class="digit-button first-row submit-button"
+          <paper-button class$="digit-button first-row submit-button
+                               [[computeSubmitHiddenClass_(enableSubmitButton)]]"

[jdufault, 2016/07/21 23:36:36]

Rename computeSubmitHiddenClass_ to just computeSubmitClass_?

nit: One more space on [[ so it aligns with 'd'

[sammiequon, 2016/07/29 18:57:38]

Done.

                         on-tap="firePinSubmitEvent_">
             <div class$="icon-container [[computeSubmitClass_(value)]]">
                 <iron-icon class="icon" icon="icons:forward"><iron-icon>