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

chrome/browser/resources/net_internals/logs_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 network related log data and is specific fo ChromeOS.
  * We get log data from chrome by filtering system logs for network related
  * keywords. Logs are not fetched until we actually need them.
  */
 var LogsView = (function() {
+  'use strict';
+
   // IDs for special HTML elements in logs_view.html
-  const MAIN_BOX_ID = 'logs-view-tab-content';
-  const TABLE_ID = 'logs-view-log-table';
-  const GLOBAL_SHOW_BUTTON_ID = 'logs-view-global-show-btn';
-  const GLOBAL_HIDE_BUTTON_ID = 'logs-view-global-hide-btn';
-  const REFRESH_LOGS_BUTTON_ID = 'logs-view-refresh-btn';
+  var MAIN_BOX_ID = 'logs-view-tab-content';
+  var TABLE_ID = 'logs-view-log-table';
+  var GLOBAL_SHOW_BUTTON_ID = 'logs-view-global-show-btn';
+  var GLOBAL_HIDE_BUTTON_ID = 'logs-view-global-hide-btn';
+  var REFRESH_LOGS_BUTTON_ID = 'logs-view-refresh-btn';
 
   // Special classes (defined in logs_view.css).
-  const LOG_ROW_COLLAPSED_CLASSNAME = 'logs-view-log-row-collapsed';
-  const LOG_ROW_EXPANDED_CLASSNAME = 'logs-view-log-row-expanded';
-  const LOG_CELL_TEXT_CLASSNAME = 'logs-view-log-cell-text';
-  const LOG_CELL_LOG_CLASSNAME = 'logs-view-log-cell-log';
-  const LOG_TABLE_BUTTON_COLUMN_CLASSNAME = 'logs-view-log-table-button-column';
-  const LOG_BUTTON_CLASSNAME = 'logs-view-log-button';
+  var LOG_ROW_COLLAPSED_CLASSNAME = 'logs-view-log-row-collapsed';
+  var LOG_ROW_EXPANDED_CLASSNAME = 'logs-view-log-row-expanded';
+  var LOG_CELL_TEXT_CLASSNAME = 'logs-view-log-cell-text';
+  var LOG_CELL_LOG_CLASSNAME = 'logs-view-log-cell-log';
+  var LOG_TABLE_BUTTON_COLUMN_CLASSNAME = 'logs-view-log-table-button-column';
+  var LOG_BUTTON_CLASSNAME = 'logs-view-log-button';
 
   // We inherit from DivView.
   var superClass = DivView;
 
   /**
    * @constructor
    */
   function LogsView() {
+    assertFirstConstructorCall(LogsView);
+
     // Call superclass's constructor.
     superClass.call(this, MAIN_BOX_ID);
 
     var tableDiv = $(TABLE_ID);
     this.rows = [];
-    this.populateTable(tableDiv, kLogFilterList);
+    this.populateTable(tableDiv, LOG_FILTER_LIST);
     $(GLOBAL_SHOW_BUTTON_ID).addEventListener('click',
         this.onGlobalChangeVisibleClick_.bind(this, true));
     $(GLOBAL_HIDE_BUTTON_ID).addEventListener('click',
         this.onGlobalChangeVisibleClick_.bind(this, false));
     $(REFRESH_LOGS_BUTTON_ID).addEventListener('click',
         this.onLogsRefresh_.bind(this));
   }
 
+  cr.addSingletonGetter(LogsView);
+
   /**
    * Contains log keys we are interested in.
    */
-  const kLogFilterList = [
+  var LOG_FILTER_LIST = [
     {
       key:'syslog',
     },
     {
       key:'ui_log',
     },
     {
       key:'chrome_system_log',
     },
     {
@@ skipping 55 matching lines @@
       row.expandButton = expandButton;
       row.logDiv = logDiv;
       row.logVisible = false;
       this.rows.push(row);
 
       return row;
     },
 
     /**
      * Initializes |tableDiv| to represent data from |logList| which should be
-     * of type kLogFilterList.
+     * of type LOG_FILTER_LIST.
      */
     populateTable: function(tableDiv, logList) {
       for (var i = 0; i < logList.length; i++) {
         var logSource = this.createTableRow(logList[i].key);
         tableDiv.appendChild(logSource);
       }
     },
 
     /**
      * Processes clicks on buttons that show or hide log contents in log row.
@@ skipping 59 matching lines @@
       // In hidden rows we just clear potential log text, so we know we have to
       // get new contents when we show the row next time.
       for (row in hiddenLogRows) {
         hiddenLogRows[row].logDiv.textContent = '';
       }
     }
   };
 
   return LogsView;
 })();