MD Settings: minor cleanup 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 94 matching lines @@
     this.$.input.blur();
   },
 
   /**
    * Keydown handler to specify enter-key and escape-key interactions.
    * @param {!Event} event
    * @private
    */
   onKeydown_: function(event) {
     // If pressed enter when input is invalid, do not trigger on-change.
-    if (event.key == 'Enter' && this.invalid) {
+    if (event.key == 'Enter' && this.invalid)
       event.preventDefault();
-      return;
-    }
-
-    if (event.key != 'Escape')
-      return;
-
-    this.resetValue_();
+    else if (event.key == 'Escape')
+      this.resetValue_();
   },
 
   /**
    * @param {boolean} disabled
    * @return {boolean} Whether the element should be disabled.
    * @private
    */
   isDisabled_: function(disabled) {
     return disabled || this.isPrefEnforced();
   },
 });