Use javascript strict mode throughout a number of net-internals files.

chrome/browser/resources/net_internals/hsts_view.js

 // Copyright (c) 2011 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.
 
 /**
  * HSTS is HTTPS Strict Transport Security: a way for sites to elect to always
  * use HTTPS. See http://dev.chromium.org/sts
  *
  * This UI allows a user to query and update the browser's list of HSTS domains.
  */
 
 var HSTSView = (function() {
+  'use strict';
+
   // IDs for special HTML elements in hsts_view.html
-  const MAIN_BOX_ID = 'hsts-view-tab-content';
-  const QUERY_INPUT_ID = 'hsts-view-query-input';
-  const FORM_ID = 'hsts-view-query-form';
-  const QUERY_OUTPUT_DIV_ID = 'hsts-view-query-output';
-  const ADD_INPUT_ID = 'hsts-view-add-input';
-  const ADD_FORM_ID = 'hsts-view-add-form';
-  const ADD_CHECK_ID = 'hsts-view-check-input';
-  const ADD_PINS_ID = 'hsts-view-add-pins';
-  const DELETE_INPUT_ID = 'hsts-view-delete-input';
-  const DELETE_FORM_ID = 'hsts-view-delete-form';
+  var MAIN_BOX_ID = 'hsts-view-tab-content';
+  var QUERY_INPUT_ID = 'hsts-view-query-input';
+  var FORM_ID = 'hsts-view-query-form';
+  var QUERY_OUTPUT_DIV_ID = 'hsts-view-query-output';
+  var ADD_INPUT_ID = 'hsts-view-add-input';
+  var ADD_FORM_ID = 'hsts-view-add-form';
+  var ADD_CHECK_ID = 'hsts-view-check-input';
+  var ADD_PINS_ID = 'hsts-view-add-pins';
+  var DELETE_INPUT_ID = 'hsts-view-delete-input';
+  var DELETE_FORM_ID = 'hsts-view-delete-form';
 
   // We inherit from DivView.
   var superClass = DivView;
 
   /**
    * @constructor
    */
   function HSTSView() {
+    assertFirstConstructorCall(HSTSView);
+
     // Call superclass's constructor.
     superClass.call(this, MAIN_BOX_ID);
 
     this.queryInput_ = $(QUERY_INPUT_ID);
     this.addCheck_ = $(ADD_CHECK_ID);
     this.addInput_ = $(ADD_INPUT_ID);
     this.addPins_ = $(ADD_PINS_ID);
     this.deleteInput_ = $(DELETE_INPUT_ID);
     this.queryOutputDiv_ = $(QUERY_OUTPUT_DIV_ID);
 
@@ skipping 103 matching lines @@
     element.style.webkitTransitionDuration = '0';
     element.style.backgroundColor = '#fffccf';
     setTimeout(function() {
       element.style.webkitTransitionDuration = '1000ms';
       element.style.backgroundColor = '#fff';
     }, 0);
   }
 
   return HSTSView;
 })();