WebUI: Fix violations of no-extra-semi lint rule.

chrome/browser/resources/settings/prefs/prefs.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-prefs' exposes a singleton model of Chrome settings and
  * preferences, which listens to changes to Chrome prefs whitelisted in
  * chrome.settingsPrivate. When changing prefs in this element's 'prefs'
  * property via the UI, the singleton model tries to set those preferences in
@@ skipping 70 matching lines @@
    * @param {*} val Value to copy. Should be a primitive or only contain
    *     serializable data (primitives, serializable arrays and
    *     serializable objects).
    * @return {*} A deep copy of the value.
    */
   function deepCopy(val) {
     if (!(val instanceof Object))
       return val;
     return Array.isArray(val) ? deepCopyArray(/** @type {!Array} */(val)) :
         deepCopyObject(val);
-  };
+  }
 
   /**
    * @param {!Array} arr
    * @return {!Array} Deep copy of the array.
    */
   function deepCopyArray(arr) {
     var copy = [];
     for (var i = 0; i < arr.length; i++)
       copy.push(deepCopy(arr[i]));
     return copy;
@@ skipping 203 matching lines @@
       this.prefs = undefined;
       this.lastPrefValues_ = {};
       this.initialized_ = false;
       // Remove the listener added in initialize().
       this.settingsApi_.onPrefsChanged.removeListener(this.boundPrefsChanged_);
       this.settingsApi_ =
           /** @type {SettingsPrivate} */(chrome.settingsPrivate);
     },
   });
 })();