Pin keyboard use enter to submit when focus is not on a button.

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

Index: chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
diff --git a/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js b/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
index ca343b2e90386434eff0b825f3037bc075960652..21ea484028a0b6f0ad1166ac6fd10f3c3f1b078f 100644
--- a/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
+++ b/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
@@ -37,13 +37,19 @@ Polymer({
 
   /** Transfers focus to the input element. */
   focus: function() {
-    this.$$('#pin-input').focus();
+    var pinInput = this.$$('#pin-input');
+    pinInput.focus();

[jdufault, 2016/07/06 21:08:51]

Revert these changes.

[sammiequon, 2016/07/06 23:38:02]

Done.

   },
 
   /** Called when a keypad number has been tapped. */
   onNumberTap_: function(event, detail) {
     var numberValue = event.target.getAttribute('value');
     this.value += numberValue;
+
+    // If the number received focus from the mouse click, we trasnfer the focus

[jdufault, 2016/07/06 21:08:51]

nit: transfer

Can you update the comment to explain why? Right now it just describes the code.

[sammiequon, 2016/07/06 23:38:02]

Done.

+    // to the input.
+    if (!event.target.receivedFocusFromKeyboard)
+      this.focus();
   },
 
   /** Fires a submit event with the current PIN value. */