login: Remove scoped keyboard disabler.

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

Index: chrome/browser/resources/chromeos/quick_unlock/md_pin_keyboard.js
diff --git a/chrome/browser/resources/chromeos/quick_unlock/md_pin_keyboard.js b/chrome/browser/resources/chromeos/quick_unlock/md_pin_keyboard.js
index d3740c76c39c4fdc94efc0eeaef7bc46903561c7..7d6c305ced2e93b6ed1fe310487e0719b9a394ba 100644
--- a/chrome/browser/resources/chromeos/quick_unlock/md_pin_keyboard.js
+++ b/chrome/browser/resources/chromeos/quick_unlock/md_pin_keyboard.js
@@ -175,9 +175,21 @@ Polymer({
     this.passwordElement.selectionEnd = end;
   },
 
-  /** Transfers focus to the input element. */
-  focus: function() {
-    this.passwordElement.focus();
+  /**
+   * Transfers focus to the input element. This should not bring up the virtual
+   * keyboard, if it is enabled. After focus, moves the caret to the correct
+   * location if specified.
+   * @param {number=} opt_selectionStart
+   * @param {number=} opt_selectionEnd
+   */
+  focus: function(opt_selectionStart, opt_selectionEnd) {
+    setTimeout(function() {
+      this.passwordElement.focus();
+      if (opt_selectionStart)
+        this.selectionStart_ = opt_selectionStart;
+      if (opt_selectionEnd)
+        this.selectionEnd_ = opt_selectionEnd;
+    }.bind(this), 0);
   },
 
   /**
@@ -193,15 +205,13 @@ Polymer({
     var selectionStart = this.selectionStart_;
     this.value = this.value.substring(0, this.selectionStart_) + numberValue +
         this.value.substring(this.selectionEnd_);
-    this.selectionStart_ = selectionStart + 1;
-    this.selectionEnd_ = this.selectionStart_;
 
     // If a number button is clicked, we do not want to switch focus to the
     // button, therefore we transfer focus back to the input, but if a number
     // button is tabbed into, it should keep focus, so users can use tab and
     // spacebar/return to enter their PIN.
     if (!event.target.receivedFocusFromKeyboard)
-      this.focus();
+      this.focus(selectionStart + 1, selectionStart + 1);
     event.preventDefault();
   },
 
@@ -258,9 +268,9 @@ Polymer({
             this.onPinClear_.bind(this), REPEAT_BACKSPACE_DELAY_MS);
     }.bind(this), INITIAL_BACKSPACE_DELAY_MS);
 
-    if (!event.target.receivedFocusFromKeyboard)
-      this.focus();
-    event.preventDefault();
+    // TODO(sammiequon): Investigate how we can keep the caret shown when
+    // holding the backspace button down. (Adding a this.focus(); call here will
+    // bring the virtual keyboard up when it is enabled.)
   },
 
   /**