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

chrome/browser/resources/net_internals/prerender_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.
 
 /**
  * This view displays information related to Prerendering.
  */
+var PrerenderView = (function() {
+  'use strict';
 
-var PrerenderView = (function() {
   // IDs for special HTML elements in prerender_view.html
-  const MAIN_BOX_ID = 'prerender-view-tab-content';
-  const ENABLED_SPAN_ID = 'prerender-view-enabled-span';
-  const HISTORY_DIV_ID = 'prerender-view-history-div';
-  const ACTIVE_DIV_ID = 'prerender-view-active-div';
+  var MAIN_BOX_ID = 'prerender-view-tab-content';
+  var ENABLED_SPAN_ID = 'prerender-view-enabled-span';
+  var HISTORY_DIV_ID = 'prerender-view-history-div';
+  var ACTIVE_DIV_ID = 'prerender-view-active-div';
 
   // We inherit from DivView.
   var superClass = DivView;
 
   /**
    * @constructor
    */
   function PrerenderView() {
+    assertFirstConstructorCall(PrerenderView);
+
     // Call superclass's constructor.
     superClass.call(this, MAIN_BOX_ID);
 
     g_browser.addPrerenderInfoObserver(this);
     this.prerenderEnabledSpan_ = $(ENABLED_SPAN_ID);
     this.prerenderHistoryDiv_ = $(HISTORY_DIV_ID);
     this.prerenderActiveDiv_ = $(ACTIVE_DIV_ID);
   }
 
   cr.addSingletonGetter(PrerenderView);
@@ skipping 67 matching lines @@
       var activeEntry = prerenderActive[i];
       tablePrinter.addRow();
       tablePrinter.addCell(activeEntry.url);
       tablePrinter.addCell(activeEntry.duration);
     }
     return tablePrinter;
   }
 
   return PrerenderView;
 })();