Pin keyboard moved to under the user profile.

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 a5cbe3b7c5c1c5616a7a1ababb4cc36f279640c4..dcb505d8338ab7285b214b0aa9260068a915224c 100644
--- a/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
+++ b/chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.js
@@ -14,6 +14,20 @@ Polymer({
     input.value += value;
   },
 
+  // Called when the user wants to clear the PIN.
+  onPinClear_: function() {
+    var pin = this.$$('#pin-input');
+    switch (pin.value.length) {
+      case 0:
+      case 1:
+        pin.value = '';
+        break;
+      default:
+        pin.value = pin.value.substring(0, pin.value.length - 1);
+        break;
+    }
+  },
+
   // Called when the user wants to submit the PIN.
   onPinSubmit_: function() {
     var pin = this.$$('#pin-input').value;