Added functionality to chrome://net-internals/#chromeos page that user

chrome/browser/resources/net_internals/chromeos_view.js

 // Copyright (c) 2012 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 on ChromeOS specific features.
  */
 var CrosView = (function() {
   'use strict';
 
@@ skipping 92 matching lines @@
    */
   function setParseStatus_(error) {
     var parseStatus = $(CrosView.PARSE_STATUS_ID);
     parseStatus.hidden = false;
     parseStatus.textContent = error ?
         'ONC file parse failed: ' + error : 'ONC file successfully parsed';
     reset_();
   }
 
   /**
+   *  Set status for current debug mode.
+   *
+   *  @private
+   */
+  function setNetworkDebugModeStatus_(status) {
+    $(CrosView.DEBUG_STATUS_ID).innerText = status;
+  }
+
+  /**
    *  An event listener for the file selection field.
    *
    *  @private
    */
   function handleFileChangeEvent_(event) {
     clearParseStatus_();
     var file = event.target.files[0];
     var reader = new FileReader();
     reader.onloadend = function(e) {
       setFileContent_(reader.result);
     };
     reader.readAsText(file);
   }
 
   /**
-   *  Add event listeners for the file selection and passcode input fields.
+   *  Add event listeners for the file selection, passcode input
+   *  fields and for buttons for debug mode selection.
    *
    *  @private
    */
   function addEventListeners_() {
     $(CrosView.IMPORT_ONC_ID).addEventListener('change',
                                                handleFileChangeEvent_,
                                                false);
 
     $(CrosView.PASSCODE_INPUT_ID).addEventListener('change', function(event) {
       setPasscode_(this.value);
     }, false);
+
+    $(CrosView.DEBUG_WIFI_ID).addEventListener('click', function(event) {
+        setNetworkDebugMode_('wifi');
+    }, false);
+    $(CrosView.DEBUG_ETHERNET_ID).addEventListener('click', function(event) {
+        setNetworkDebugMode_('ethernet');
+    }, false);
+    $(CrosView.DEBUG_CELLULAR_ID).addEventListener('click', function(event) {
+        setNetworkDebugMode_('cellular');
+    }, false);
+    $(CrosView.DEBUG_NONE_ID).addEventListener('click', function(event) {
+        setNetworkDebugMode_('none');
+    }, false);
   }
 
   /**
    *  Reset fileContent and passcode vars.
    *
    *  @private
    */
   function reset_() {
     fileContent = undefined;
     passcode = '';
     $(CrosView.PASSCODE_ID).hidden = true;
   }
 
   /**
+   *  Enables or disables debug mode for a specified subsystem.
+   *
+   *  @private
+   */
+  function setNetworkDebugMode_(subsystem) {
+    $(CrosView.DEBUG_STATUS_ID).innerText = '';
+    g_browser.setNetworkDebugMode(subsystem);
+  }
+
+  /**
    *  @constructor
    *  @extends {DivView}
    */
   function CrosView() {
     assertFirstConstructorCall(CrosView);
 
     // Call superclass's constructor.
     DivView.call(this, CrosView.MAIN_BOX_ID);
 
     g_browser.addCrosONCFileParseObserver(this);
+    g_browser.addSetNetworkDebugModeObserver(this);
     addEventListeners_();
   }
 
   // ID for special HTML element in category_tabs.html
   CrosView.TAB_HANDLE_ID = 'tab-handle-chromeos';
 
   CrosView.MAIN_BOX_ID = 'chromeos-view-tab-content';
   CrosView.IMPORT_DIV_ID = 'chromeos-view-import-div';
   CrosView.IMPORT_ONC_ID = 'chromeos-view-import-onc';
   CrosView.PASSCODE_ID = 'chromeos-view-password-div';
   CrosView.PASSCODE_INPUT_ID = 'chromeos-view-onc-password';
   CrosView.PARSE_STATUS_ID = 'chromeos-view-parse-status';
+  CrosView.DEBUG_WIFI_ID = 'chromeos-view-network-debugging-wifi';
+  CrosView.DEBUG_ETHERNET_ID = 'chromeos-view-network-debugging-ethernet';
+  CrosView.DEBUG_CELLULAR_ID = 'chromeos-view-network-debugging-cellular';
+  CrosView.DEBUG_NONE_ID = 'chromeos-view-network-debugging-none';
+  CrosView.DEBUG_STATUS_ID = 'chromeos-view-network-debugging-status';
 
   cr.addSingletonGetter(CrosView);
 
   CrosView.prototype = {
     // Inherit from DivView.
     __proto__: DivView.prototype,
 
     onONCFileParse: setParseStatus_,
+    onSetNetworkDebugMode: setNetworkDebugModeStatus_,
   };
 
   return CrosView;
 })();