MD Settings: Use "change" event instead of "blur" for settings-input.

chrome/browser/resources/settings/controls/settings_input.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview
  * `settings-input` is a single-line text field for user input associated
  * with a pref value.
  */
 Polymer({
@@ skipping 72 matching lines @@
    * Gets a tab index for this control if it can be tabbed to.
    * @param {boolean} canTab
    * @return {number}
    * @private
    */
   getTabindex_: function(canTab) {
     return canTab ? 0 : -1;
   },
 
   /**
-   * Blur method for paper-input. Only update the pref value on a blur event.
+   * Change event handler for paper-input. Updates the pref value.
+   * settings-input uses the change event because it is fired by the Enter key.
    * @private
    */
-  onBlur_: function() {
+  onChange_: function() {
     if (!this.pref)
       return;
 
     if (this.pref.type == chrome.settingsPrivate.PrefType.NUMBER) {
       if (!this.value) {
         // Ignore empty input field and restore value.
         this.value = this.pref.value.toString();
         return;
       }
       var n = parseInt(this.value, 10);
@@ skipping 12 matching lines @@
   /**
    * @param {boolean} disabled
    * @param {!chrome.settingsPrivate.PrefObject} pref
    * @return {boolean} Whether the element should be disabled.
    * @private
    */
   isDisabled_: function(disabled, pref) {
     return disabled || this.isPrefPolicyControlled(pref);
   },
 });