DevTools: reformat front-end code to match chromium style.

third_party/WebKit/Source/devtools/front_end/network/NetworkPanel.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008, 2009 Anthony Ricaud <rik@webkit.org>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  *     its contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-
 /**
- * @constructor
  * @implements {WebInspector.ContextMenu.Provider}
  * @implements {WebInspector.Searchable}
- * @extends {WebInspector.Panel}
+ * @unrestricted
  */
-WebInspector.NetworkPanel = function()
-{
-    WebInspector.Panel.call(this, "network");
-    this.registerRequiredCSS("network/networkPanel.css");
+WebInspector.NetworkPanel = class extends WebInspector.Panel {
+  constructor() {
+    super('network');
+    this.registerRequiredCSS('network/networkPanel.css');
 
-    this._networkLogShowOverviewSetting = WebInspector.settings.createSetting("networkLogShowOverview", true);
-    this._networkLogLargeRowsSetting = WebInspector.settings.createSetting("networkLogLargeRows", false);
-    this._networkRecordFilmStripSetting = WebInspector.settings.createSetting("networkRecordFilmStripSetting", false);
-    this._toggleRecordAction = /** @type {!WebInspector.Action }*/(WebInspector.actionRegistry.action("network.toggle-recording"));
+    this._networkLogShowOverviewSetting = WebInspector.settings.createSetting('networkLogShowOverview', true);
+    this._networkLogLargeRowsSetting = WebInspector.settings.createSetting('networkLogLargeRows', false);
+    this._networkRecordFilmStripSetting = WebInspector.settings.createSetting('networkRecordFilmStripSetting', false);
+    this._toggleRecordAction =
+        /** @type {!WebInspector.Action }*/ (WebInspector.actionRegistry.action('network.toggle-recording'));
 
     /** @type {?WebInspector.FilmStripView} */
     this._filmStripView = null;
     /** @type {?WebInspector.NetworkPanel.FilmStripRecorder} */
     this._filmStripRecorder = null;
 
-    this._panelToolbar = new WebInspector.Toolbar("", this.element);
-    this._filterBar = new WebInspector.FilterBar("networkPanel", true);
+    this._panelToolbar = new WebInspector.Toolbar('', this.element);
+    this._filterBar = new WebInspector.FilterBar('networkPanel', true);
     this._filterBar.show(this.element);
 
     // Create top overview component.
-    this._overviewPane = new WebInspector.TimelineOverviewPane("network");
-    this._overviewPane.addEventListener(WebInspector.TimelineOverviewPane.Events.WindowChanged, this._onWindowChanged.bind(this));
-    this._overviewPane.element.id = "network-overview-panel";
+    this._overviewPane = new WebInspector.TimelineOverviewPane('network');
+    this._overviewPane.addEventListener(
+        WebInspector.TimelineOverviewPane.Events.WindowChanged, this._onWindowChanged.bind(this));
+    this._overviewPane.element.id = 'network-overview-panel';
     this._networkOverview = new WebInspector.NetworkOverview();
     this._overviewPane.setOverviewControls([this._networkOverview]);
     this._calculator = new WebInspector.NetworkTransferTimeCalculator();
 
-    this._splitWidget = new WebInspector.SplitWidget(true, false, "networkPanelSplitViewState");
+    this._splitWidget = new WebInspector.SplitWidget(true, false, 'networkPanelSplitViewState');
     this._splitWidget.hideMain();
 
     this._splitWidget.show(this.element);
 
-    this._progressBarContainer = createElement("div");
+    this._progressBarContainer = createElement('div');
     this._createToolbarButtons();
 
     this._searchableView = new WebInspector.SearchableView(this);
-    this._searchableView.setPlaceholder(WebInspector.UIString("Find by filename or path"));
+    this._searchableView.setPlaceholder(WebInspector.UIString('Find by filename or path'));
 
     /** @type {!WebInspector.NetworkLogView} */
-    this._networkLogView = new WebInspector.NetworkLogView(this._filterBar, this._progressBarContainer, this._networkLogLargeRowsSetting);
+    this._networkLogView =
+        new WebInspector.NetworkLogView(this._filterBar, this._progressBarContainer, this._networkLogLargeRowsSetting);
     this._networkLogView.show(this._searchableView.element);
 
     this._splitWidget.setSidebarWidget(this._searchableView);
 
     this._detailsWidget = new WebInspector.VBox();
-    this._detailsWidget.element.classList.add("network-details-view");
+    this._detailsWidget.element.classList.add('network-details-view');
     this._splitWidget.setMainWidget(this._detailsWidget);
 
-    this._closeButtonElement = createElement("div", "dt-close-button");
-    this._closeButtonElement.addEventListener("click", this._showRequest.bind(this, null), false);
+    this._closeButtonElement = createElement('div', 'dt-close-button');
+    this._closeButtonElement.addEventListener('click', this._showRequest.bind(this, null), false);
 
     this._networkLogShowOverviewSetting.addChangeListener(this._toggleShowOverview, this);
     this._networkLogLargeRowsSetting.addChangeListener(this._toggleLargerRequests, this);
     this._networkRecordFilmStripSetting.addChangeListener(this._toggleRecordFilmStrip, this);
 
     this._toggleRecord(true);
     this._toggleShowOverview();
     this._toggleLargerRequests();
     this._toggleRecordFilmStrip();
     this._updateUI();
 
-    WebInspector.targetManager.addModelListener(WebInspector.ResourceTreeModel, WebInspector.ResourceTreeModel.Events.WillReloadPage, this._willReloadPage, this);
-    WebInspector.targetManager.addModelListener(WebInspector.ResourceTreeModel, WebInspector.ResourceTreeModel.Events.Load, this._load, this);
-    this._networkLogView.addEventListener(WebInspector.NetworkLogView.Events.RequestSelected, this._onRequestSelected, this);
-    this._networkLogView.addEventListener(WebInspector.NetworkLogView.Events.SearchCountUpdated, this._onSearchCountUpdated, this);
-    this._networkLogView.addEventListener(WebInspector.NetworkLogView.Events.SearchIndexUpdated, this._onSearchIndexUpdated, this);
-    this._networkLogView.addEventListener(WebInspector.NetworkLogView.Events.UpdateRequest, this._onUpdateRequest, this);
+    WebInspector.targetManager.addModelListener(
+        WebInspector.ResourceTreeModel, WebInspector.ResourceTreeModel.Events.WillReloadPage, this._willReloadPage,
+        this);
+    WebInspector.targetManager.addModelListener(
+        WebInspector.ResourceTreeModel, WebInspector.ResourceTreeModel.Events.Load, this._load, this);
+    this._networkLogView.addEventListener(
+        WebInspector.NetworkLogView.Events.RequestSelected, this._onRequestSelected, this);
+    this._networkLogView.addEventListener(
+        WebInspector.NetworkLogView.Events.SearchCountUpdated, this._onSearchCountUpdated, this);
+    this._networkLogView.addEventListener(
+        WebInspector.NetworkLogView.Events.SearchIndexUpdated, this._onSearchIndexUpdated, this);
+    this._networkLogView.addEventListener(
+        WebInspector.NetworkLogView.Events.UpdateRequest, this._onUpdateRequest, this);
 
     WebInspector.DataSaverInfobar.maybeShowInPanel(this);
-};
-
-WebInspector.NetworkPanel.displayScreenshotDelay = 1000;
-
-WebInspector.NetworkPanel.prototype = {
+  }
+
+  /**
+   * @param {!Array<{filterType: !WebInspector.NetworkLogView.FilterType, filterValue: string}>} filters
+   */
+  static revealAndFilter(filters) {
+    var panel = WebInspector.NetworkPanel._instance();
+    var filterString = '';
+    for (var filter of filters)
+      filterString += `${filter.filterType}:${filter.filterValue} `;
+    panel._networkLogView.setTextFilterValue(filterString);
+    WebInspector.viewManager.showView('network');
+  }
+
+  /**
+   * @return {!WebInspector.NetworkPanel}
+   */
+  static _instance() {
+    return /** @type {!WebInspector.NetworkPanel} */ (self.runtime.sharedInstance(WebInspector.NetworkPanel));
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _onWindowChanged(event) {
+    var startTime = Math.max(this._calculator.minimumBoundary(), event.data.startTime / 1000);
+    var endTime = Math.min(this._calculator.maximumBoundary(), event.data.endTime / 1000);
+    this._networkLogView.setWindow(startTime, endTime);
+  }
+
+  _createToolbarButtons() {
+    this._panelToolbar.appendToolbarItem(WebInspector.Toolbar.createActionButton(this._toggleRecordAction));
+
+    this._clearButton = new WebInspector.ToolbarButton(WebInspector.UIString('Clear'), 'clear-toolbar-item');
+    this._clearButton.addEventListener('click', this._onClearButtonClicked, this);
+    this._panelToolbar.appendToolbarItem(this._clearButton);
+    this._panelToolbar.appendSeparator();
+    var recordFilmStripButton = new WebInspector.ToolbarSettingToggle(
+        this._networkRecordFilmStripSetting, 'camera-toolbar-item', WebInspector.UIString('Capture screenshots'));
+    this._panelToolbar.appendToolbarItem(recordFilmStripButton);
+
+    this._panelToolbar.appendToolbarItem(this._filterBar.filterButton());
+    this._panelToolbar.appendSeparator();
+
+    this._panelToolbar.appendText(WebInspector.UIString('View:'));
+
+    var largerRequestsButton = new WebInspector.ToolbarSettingToggle(
+        this._networkLogLargeRowsSetting, 'large-list-toolbar-item', WebInspector.UIString('Use large request rows'),
+        WebInspector.UIString('Use small request rows'));
+    this._panelToolbar.appendToolbarItem(largerRequestsButton);
+
+    var showOverviewButton = new WebInspector.ToolbarSettingToggle(
+        this._networkLogShowOverviewSetting, 'waterfall-toolbar-item', WebInspector.UIString('Show overview'),
+        WebInspector.UIString('Hide overview'));
+    this._panelToolbar.appendToolbarItem(showOverviewButton);
+    this._panelToolbar.appendSeparator();
+
+    this._preserveLogCheckbox = new WebInspector.ToolbarCheckbox(
+        WebInspector.UIString('Preserve log'), WebInspector.UIString('Do not clear log on page reload / navigation'));
+    this._preserveLogCheckbox.inputElement.addEventListener(
+        'change', this._onPreserveLogCheckboxChanged.bind(this), false);
+    this._panelToolbar.appendToolbarItem(this._preserveLogCheckbox);
+
+    this._disableCacheCheckbox = new WebInspector.ToolbarCheckbox(
+        WebInspector.UIString('Disable cache'), WebInspector.UIString('Disable cache (while DevTools is open)'),
+        WebInspector.moduleSetting('cacheDisabled'));
+    this._panelToolbar.appendToolbarItem(this._disableCacheCheckbox);
+
+    this._panelToolbar.appendSeparator();
+    this._panelToolbar.appendToolbarItem(this._createBlockedURLsButton());
+    this._panelToolbar.appendToolbarItem(WebInspector.NetworkConditionsSelector.createOfflineToolbarCheckbox());
+    this._panelToolbar.appendToolbarItem(this._createNetworkConditionsSelect());
+    this._panelToolbar.appendToolbarItem(new WebInspector.ToolbarItem(this._progressBarContainer));
+  }
+
+  /**
+   * @return {!WebInspector.ToolbarItem}
+   */
+  _createBlockedURLsButton() {
+    var setting = WebInspector.moduleSetting('blockedURLs');
+    setting.addChangeListener(updateAction);
+    var action = /** @type {!WebInspector.Action }*/ (WebInspector.actionRegistry.action('network.blocked-urls.show'));
+    var button = WebInspector.Toolbar.createActionButton(action);
+    button.setVisible(Runtime.experiments.isEnabled('requestBlocking'));
+    updateAction();
+    return button;
+
+    function updateAction() {
+      action.setToggled(!!setting.get().length);
+    }
+  }
+
+  /**
+   * @return {!WebInspector.ToolbarComboBox}
+   */
+  _createNetworkConditionsSelect() {
+    var toolbarItem = new WebInspector.ToolbarComboBox(null);
+    toolbarItem.setMaxWidth(140);
+    WebInspector.NetworkConditionsSelector.decorateSelect(toolbarItem.selectElement());
+    return toolbarItem;
+  }
+
+  _toggleRecording() {
+    if (!this._preserveLogCheckbox.checked() && !this._toggleRecordAction.toggled())
+      this._reset();
+    this._toggleRecord(!this._toggleRecordAction.toggled());
+  }
+
+  /**
+   * @param {boolean} toggled
+   */
+  _toggleRecord(toggled) {
+    this._toggleRecordAction.setToggled(toggled);
+    this._networkLogView.setRecording(toggled);
+    if (!toggled && this._filmStripRecorder)
+      this._filmStripRecorder.stopRecording(this._filmStripAvailable.bind(this));
+  }
+
+  /**
+   * @param {?WebInspector.FilmStripModel} filmStripModel
+   */
+  _filmStripAvailable(filmStripModel) {
+    if (!filmStripModel)
+      return;
+    var calculator = this._networkLogView.timeCalculator();
+    this._filmStripView.setModel(filmStripModel, calculator.minimumBoundary() * 1000, calculator.boundarySpan() * 1000);
+    this._networkOverview.setFilmStripModel(filmStripModel);
+    var timestamps = filmStripModel.frames().map(mapTimestamp);
+
     /**
-     * @param {!WebInspector.Event} event
+     * @param {!WebInspector.FilmStripModel.Frame} frame
+     * @return {number}
      */
-    _onWindowChanged: function(event)
-    {
-        var startTime = Math.max(this._calculator.minimumBoundary(), event.data.startTime / 1000);
-        var endTime = Math.min(this._calculator.maximumBoundary(), event.data.endTime / 1000);
-        this._networkLogView.setWindow(startTime, endTime);
-    },
-
-    _createToolbarButtons: function()
-    {
-        this._panelToolbar.appendToolbarItem(WebInspector.Toolbar.createActionButton(this._toggleRecordAction));
-
-        this._clearButton = new WebInspector.ToolbarButton(WebInspector.UIString("Clear"), "clear-toolbar-item");
-        this._clearButton.addEventListener("click", this._onClearButtonClicked, this);
-        this._panelToolbar.appendToolbarItem(this._clearButton);
-        this._panelToolbar.appendSeparator();
-        var recordFilmStripButton = new WebInspector.ToolbarSettingToggle(this._networkRecordFilmStripSetting, "camera-toolbar-item", WebInspector.UIString("Capture screenshots"));
-        this._panelToolbar.appendToolbarItem(recordFilmStripButton);
-
-        this._panelToolbar.appendToolbarItem(this._filterBar.filterButton());
-        this._panelToolbar.appendSeparator();
-
-        this._panelToolbar.appendText(WebInspector.UIString("View:"));
-
-        var largerRequestsButton = new WebInspector.ToolbarSettingToggle(this._networkLogLargeRowsSetting, "large-list-toolbar-item", WebInspector.UIString("Use large request rows"), WebInspector.UIString("Use small request rows"));
-        this._panelToolbar.appendToolbarItem(largerRequestsButton);
-
-        var showOverviewButton = new WebInspector.ToolbarSettingToggle(this._networkLogShowOverviewSetting, "waterfall-toolbar-item", WebInspector.UIString("Show overview"), WebInspector.UIString("Hide overview"));
-        this._panelToolbar.appendToolbarItem(showOverviewButton);
-        this._panelToolbar.appendSeparator();
-
-        this._preserveLogCheckbox = new WebInspector.ToolbarCheckbox(WebInspector.UIString("Preserve log"), WebInspector.UIString("Do not clear log on page reload / navigation"));
-        this._preserveLogCheckbox.inputElement.addEventListener("change", this._onPreserveLogCheckboxChanged.bind(this), false);
-        this._panelToolbar.appendToolbarItem(this._preserveLogCheckbox);
-
-        this._disableCacheCheckbox = new WebInspector.ToolbarCheckbox(WebInspector.UIString("Disable cache"), WebInspector.UIString("Disable cache (while DevTools is open)"), WebInspector.moduleSetting("cacheDisabled"));
-        this._panelToolbar.appendToolbarItem(this._disableCacheCheckbox);
-
-        this._panelToolbar.appendSeparator();
-        this._panelToolbar.appendToolbarItem(this._createBlockedURLsButton());
-        this._panelToolbar.appendToolbarItem(WebInspector.NetworkConditionsSelector.createOfflineToolbarCheckbox());
-        this._panelToolbar.appendToolbarItem(this._createNetworkConditionsSelect());
-        this._panelToolbar.appendToolbarItem(new WebInspector.ToolbarItem(this._progressBarContainer));
-    },
-
+    function mapTimestamp(frame) {
+      return frame.timestamp / 1000;
+    }
+
+    this._networkLogView.addFilmStripFrames(timestamps);
+  }
+
+  /**
+   * @param {!Event} event
+   */
+  _onPreserveLogCheckboxChanged(event) {
+    this._networkLogView.setPreserveLog(this._preserveLogCheckbox.checked());
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _onClearButtonClicked(event) {
+    this._reset();
+  }
+
+  _reset() {
+    this._calculator.reset();
+    this._overviewPane.reset();
+    this._networkLogView.reset();
+    WebInspector.BlockedURLsPane.reset();
+    if (this._filmStripView)
+      this._resetFilmStripView();
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _willReloadPage(event) {
+    if (!this._preserveLogCheckbox.checked())
+      this._reset();
+    this._toggleRecord(true);
+    if (this._pendingStopTimer) {
+      clearTimeout(this._pendingStopTimer);
+      delete this._pendingStopTimer;
+    }
+    if (this.isShowing() && this._filmStripRecorder)
+      this._filmStripRecorder.startRecording();
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _load(event) {
+    if (this._filmStripRecorder && this._filmStripRecorder.isRecording())
+      this._pendingStopTimer =
+          setTimeout(this._stopFilmStripRecording.bind(this), WebInspector.NetworkPanel.displayScreenshotDelay);
+  }
+
+  _stopFilmStripRecording() {
+    this._filmStripRecorder.stopRecording(this._filmStripAvailable.bind(this));
+    delete this._pendingStopTimer;
+  }
+
+  _toggleLargerRequests() {
+    this._updateUI();
+  }
+
+  _toggleShowOverview() {
+    var toggled = this._networkLogShowOverviewSetting.get();
+    if (toggled)
+      this._overviewPane.show(this.element, this._splitWidget.element);
+    else
+      this._overviewPane.detach();
+    this.doResize();
+  }
+
+  _toggleRecordFilmStrip() {
+    var toggled = this._networkRecordFilmStripSetting.get();
+    if (toggled && !this._filmStripRecorder) {
+      this._filmStripView = new WebInspector.FilmStripView();
+      this._filmStripView.setMode(WebInspector.FilmStripView.Modes.FrameBased);
+      this._filmStripView.element.classList.add('network-film-strip');
+      this._filmStripRecorder =
+          new WebInspector.NetworkPanel.FilmStripRecorder(this._networkLogView.timeCalculator(), this._filmStripView);
+      this._filmStripView.show(this.element, this.element.firstElementChild);
+      this._filmStripView.addEventListener(
+          WebInspector.FilmStripView.Events.FrameSelected, this._onFilmFrameSelected, this);
+      this._filmStripView.addEventListener(WebInspector.FilmStripView.Events.FrameEnter, this._onFilmFrameEnter, this);
+      this._filmStripView.addEventListener(WebInspector.FilmStripView.Events.FrameExit, this._onFilmFrameExit, this);
+      this._resetFilmStripView();
+    }
+
+    if (!toggled && this._filmStripRecorder) {
+      this._filmStripView.detach();
+      this._filmStripView = null;
+      this._filmStripRecorder = null;
+    }
+  }
+
+  _resetFilmStripView() {
+    this._filmStripView.reset();
+    this._filmStripView.setStatusText(WebInspector.UIString(
+        'Hit %s to reload and capture filmstrip.',
+        WebInspector.shortcutRegistry.shortcutDescriptorsForAction('main.reload')[0].name));
+  }
+
+  /**
+   * @override
+   * @return {!Array.<!Element>}
+   */
+  elementsToRestoreScrollPositionsFor() {
+    return this._networkLogView.elementsToRestoreScrollPositionsFor();
+  }
+
+  /**
+   * @override
+   * @return {!WebInspector.SearchableView}
+   */
+  searchableView() {
+    return this._searchableView;
+  }
+
+  /**
+   * @override
+   * @param {!KeyboardEvent} event
+   */
+  handleShortcut(event) {
+    if (this._networkItemView && event.keyCode === WebInspector.KeyboardShortcut.Keys.Esc.code) {
+      this._showRequest(null);
+      event.handled = true;
+      return;
+    }
+
+    super.handleShortcut(event);
+  }
+
+  /**
+   * @override
+   */
+  wasShown() {
+    WebInspector.context.setFlavor(WebInspector.NetworkPanel, this);
+  }
+
+  /**
+   * @override
+   */
+  willHide() {
+    WebInspector.context.setFlavor(WebInspector.NetworkPanel, null);
+  }
+
+  /**
+   * @param {!WebInspector.NetworkRequest} request
+   */
+  revealAndHighlightRequest(request) {
+    this._showRequest(null);
+    if (request)
+      this._networkLogView.revealAndHighlightRequest(request);
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _onRowSizeChanged(event) {
+    this._updateUI();
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _onSearchCountUpdated(event) {
+    var count = /** @type {number} */ (event.data);
+    this._searchableView.updateSearchMatchesCount(count);
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _onSearchIndexUpdated(event) {
+    var index = /** @type {number} */ (event.data);
+    this._searchableView.updateCurrentMatchIndex(index);
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _onRequestSelected(event) {
+    var request = /** @type {?WebInspector.NetworkRequest} */ (event.data);
+    this._showRequest(request);
+  }
+
+  /**
+   * @param {?WebInspector.NetworkRequest} request
+   */
+  _showRequest(request) {
+    if (this._networkItemView) {
+      this._networkItemView.detach();
+      this._networkItemView = null;
+    }
+
+    if (request) {
+      this._networkItemView = new WebInspector.NetworkItemView(request, this._networkLogView.timeCalculator());
+      this._networkItemView.leftToolbar().appendToolbarItem(new WebInspector.ToolbarItem(this._closeButtonElement));
+      this._networkItemView.show(this._detailsWidget.element);
+      this._splitWidget.showBoth();
+    } else {
+      this._splitWidget.hideMain();
+      this._networkLogView.clearSelection();
+    }
+    this._updateUI();
+  }
+
+  _updateUI() {
+    this._detailsWidget.element.classList.toggle(
+        'network-details-view-tall-header', this._networkLogLargeRowsSetting.get());
+    this._networkLogView.switchViewMode(!this._splitWidget.isResizable());
+  }
+
+  /**
+   * @override
+   * @param {!WebInspector.SearchableView.SearchConfig} searchConfig
+   * @param {boolean} shouldJump
+   * @param {boolean=} jumpBackwards
+   */
+  performSearch(searchConfig, shouldJump, jumpBackwards) {
+    this._networkLogView.performSearch(searchConfig, shouldJump, jumpBackwards);
+  }
+
+  /**
+   * @override
+   */
+  jumpToPreviousSearchResult() {
+    this._networkLogView.jumpToPreviousSearchResult();
+  }
+
+  /**
+   * @override
+   * @return {boolean}
+   */
+  supportsCaseSensitiveSearch() {
+    return false;
+  }
+
+  /**
+   * @override
+   * @return {boolean}
+   */
+  supportsRegexSearch() {
+    return false;
+  }
+
+  /**
+   * @override
+   */
+  jumpToNextSearchResult() {
+    this._networkLogView.jumpToNextSearchResult();
+  }
+
+  /**
+   * @override
+   */
+  searchCanceled() {
+    this._networkLogView.searchCanceled();
+  }
+
+  /**
+   * @override
+   * @param {!Event} event
+   * @param {!WebInspector.ContextMenu} contextMenu
+   * @param {!Object} target
+   * @this {WebInspector.NetworkPanel}
+   */
+  appendApplicableItems(event, contextMenu, target) {
     /**
-     * @return {!WebInspector.ToolbarItem}
-     */
-    _createBlockedURLsButton: function()
-    {
-        var setting = WebInspector.moduleSetting("blockedURLs");
-        setting.addChangeListener(updateAction);
-        var action = /** @type {!WebInspector.Action }*/(WebInspector.actionRegistry.action("network.blocked-urls.show"));
-        var button = WebInspector.Toolbar.createActionButton(action);
-        button.setVisible(Runtime.experiments.isEnabled("requestBlocking"));
-        updateAction();
-        return button;
-
-        function updateAction()
-        {
-            action.setToggled(!!setting.get().length);
-        }
-    },
-
-    /**
-     * @return {!WebInspector.ToolbarComboBox}
-     */
-    _createNetworkConditionsSelect: function()
-    {
-        var toolbarItem = new WebInspector.ToolbarComboBox(null);
-        toolbarItem.setMaxWidth(140);
-        WebInspector.NetworkConditionsSelector.decorateSelect(toolbarItem.selectElement());
-        return toolbarItem;
-    },
-
-    _toggleRecording: function()
-    {
-        if (!this._preserveLogCheckbox.checked() && !this._toggleRecordAction.toggled())
-            this._reset();
-        this._toggleRecord(!this._toggleRecordAction.toggled());
-    },
-
-    /**
-     * @param {boolean} toggled
-     */
-    _toggleRecord: function(toggled)
-    {
-        this._toggleRecordAction.setToggled(toggled);
-        this._networkLogView.setRecording(toggled);
-        if (!toggled && this._filmStripRecorder)
-            this._filmStripRecorder.stopRecording(this._filmStripAvailable.bind(this));
-    },
-
-    /**
-     * @param {?WebInspector.FilmStripModel} filmStripModel
-     */
-    _filmStripAvailable: function(filmStripModel)
-    {
-        if (!filmStripModel)
-            return;
-        var calculator = this._networkLogView.timeCalculator();
-        this._filmStripView.setModel(filmStripModel, calculator.minimumBoundary() * 1000, calculator.boundarySpan() * 1000);
-        this._networkOverview.setFilmStripModel(filmStripModel);
-        var timestamps = filmStripModel.frames().map(mapTimestamp);
-
-        /**
-         * @param {!WebInspector.FilmStripModel.Frame} frame
-         * @return {number}
-         */
-        function mapTimestamp(frame)
-        {
-            return frame.timestamp / 1000;
-        }
-
-        this._networkLogView.addFilmStripFrames(timestamps);
-    },
-
-    /**
-     * @param {!Event} event
-     */
-    _onPreserveLogCheckboxChanged: function(event)
-    {
-        this._networkLogView.setPreserveLog(this._preserveLogCheckbox.checked());
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onClearButtonClicked: function(event)
-    {
-        this._reset();
-    },
-
-    _reset: function()
-    {
-        this._calculator.reset();
-        this._overviewPane.reset();
-        this._networkLogView.reset();
-        WebInspector.BlockedURLsPane.reset();
-        if (this._filmStripView)
-            this._resetFilmStripView();
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _willReloadPage: function(event)
-    {
-        if (!this._preserveLogCheckbox.checked())
-            this._reset();
-        this._toggleRecord(true);
-        if (this._pendingStopTimer) {
-            clearTimeout(this._pendingStopTimer);
-            delete this._pendingStopTimer;
-        }
-        if (this.isShowing() && this._filmStripRecorder)
-            this._filmStripRecorder.startRecording();
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _load: function(event)
-    {
-        if (this._filmStripRecorder && this._filmStripRecorder.isRecording())
-            this._pendingStopTimer = setTimeout(this._stopFilmStripRecording.bind(this), WebInspector.NetworkPanel.displayScreenshotDelay);
-    },
-
-    _stopFilmStripRecording: function()
-    {
-        this._filmStripRecorder.stopRecording(this._filmStripAvailable.bind(this));
-        delete this._pendingStopTimer;
-    },
-
-    _toggleLargerRequests: function()
-    {
-        this._updateUI();
-    },
-
-    _toggleShowOverview: function()
-    {
-        var toggled = this._networkLogShowOverviewSetting.get();
-        if (toggled)
-            this._overviewPane.show(this.element, this._splitWidget.element);
-        else
-            this._overviewPane.detach();
-        this.doResize();
-    },
-
-    _toggleRecordFilmStrip: function()
-    {
-        var toggled = this._networkRecordFilmStripSetting.get();
-        if (toggled && !this._filmStripRecorder) {
-            this._filmStripView = new WebInspector.FilmStripView();
-            this._filmStripView.setMode(WebInspector.FilmStripView.Modes.FrameBased);
-            this._filmStripView.element.classList.add("network-film-strip");
-            this._filmStripRecorder = new WebInspector.NetworkPanel.FilmStripRecorder(this._networkLogView.timeCalculator(), this._filmStripView);
-            this._filmStripView.show(this.element, this.element.firstElementChild);
-            this._filmStripView.addEventListener(WebInspector.FilmStripView.Events.FrameSelected, this._onFilmFrameSelected, this);
-            this._filmStripView.addEventListener(WebInspector.FilmStripView.Events.FrameEnter, this._onFilmFrameEnter, this);
-            this._filmStripView.addEventListener(WebInspector.FilmStripView.Events.FrameExit, this._onFilmFrameExit, this);
-            this._resetFilmStripView();
-        }
-
-        if (!toggled && this._filmStripRecorder) {
-            this._filmStripView.detach();
-            this._filmStripView = null;
-            this._filmStripRecorder = null;
-        }
-    },
-
-    _resetFilmStripView: function()
-    {
-        this._filmStripView.reset();
-        this._filmStripView.setStatusText(WebInspector.UIString("Hit %s to reload and capture filmstrip.", WebInspector.shortcutRegistry.shortcutDescriptorsForAction("main.reload")[0].name));
-    },
-
-    /**
-     * @override
-     * @return {!Array.<!Element>}
-     */
-    elementsToRestoreScrollPositionsFor: function()
-    {
-        return this._networkLogView.elementsToRestoreScrollPositionsFor();
-    },
-
-    /**
-     * @override
-     * @return {!WebInspector.SearchableView}
-     */
-    searchableView: function()
-    {
-        return this._searchableView;
-    },
-
-    /**
-     * @override
-     * @param {!KeyboardEvent} event
-     */
-    handleShortcut: function(event)
-    {
-        if (this._networkItemView && event.keyCode === WebInspector.KeyboardShortcut.Keys.Esc.code) {
-            this._showRequest(null);
-            event.handled = true;
-            return;
-        }
-
-        WebInspector.Panel.prototype.handleShortcut.call(this, event);
-    },
-
-    wasShown: function()
-    {
-        WebInspector.context.setFlavor(WebInspector.NetworkPanel, this);
-    },
-
-    willHide: function()
-    {
-        WebInspector.context.setFlavor(WebInspector.NetworkPanel, null);
-    },
-
-    /**
-     * @param {!WebInspector.NetworkRequest} request
-     */
-    revealAndHighlightRequest: function(request)
-    {
-        this._showRequest(null);
-        if (request)
-            this._networkLogView.revealAndHighlightRequest(request);
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onRowSizeChanged: function(event)
-    {
-        this._updateUI();
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onSearchCountUpdated: function(event)
-    {
-        var count = /** @type {number} */ (event.data);
-        this._searchableView.updateSearchMatchesCount(count);
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onSearchIndexUpdated: function(event)
-    {
-        var index = /** @type {number} */ (event.data);
-        this._searchableView.updateCurrentMatchIndex(index);
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onRequestSelected: function(event)
-    {
-        var request = /** @type {?WebInspector.NetworkRequest} */ (event.data);
-        this._showRequest(request);
-    },
-
-    /**
-     * @param {?WebInspector.NetworkRequest} request
-     */
-    _showRequest: function(request)
-    {
-        if (this._networkItemView) {
-            this._networkItemView.detach();
-            this._networkItemView = null;
-        }
-
-        if (request) {
-            this._networkItemView = new WebInspector.NetworkItemView(request, this._networkLogView.timeCalculator());
-            this._networkItemView.leftToolbar().appendToolbarItem(new WebInspector.ToolbarItem(this._closeButtonElement));
-            this._networkItemView.show(this._detailsWidget.element);
-            this._splitWidget.showBoth();
-        } else {
-            this._splitWidget.hideMain();
-            this._networkLogView.clearSelection();
-        }
-        this._updateUI();
-    },
-
-    _updateUI: function()
-    {
-        this._detailsWidget.element.classList.toggle("network-details-view-tall-header", this._networkLogLargeRowsSetting.get());
-        this._networkLogView.switchViewMode(!this._splitWidget.isResizable());
-    },
-
-    /**
-     * @override
-     * @param {!WebInspector.SearchableView.SearchConfig} searchConfig
-     * @param {boolean} shouldJump
-     * @param {boolean=} jumpBackwards
-     */
-    performSearch: function(searchConfig, shouldJump, jumpBackwards)
-    {
-        this._networkLogView.performSearch(searchConfig, shouldJump, jumpBackwards);
-    },
-
-    /**
-     * @override
-     */
-    jumpToPreviousSearchResult: function()
-    {
-        this._networkLogView.jumpToPreviousSearchResult();
-    },
-
-    /**
-     * @override
-     * @return {boolean}
-     */
-    supportsCaseSensitiveSearch: function()
-    {
-        return false;
-    },
-
-    /**
-     * @override
-     * @return {boolean}
-     */
-    supportsRegexSearch: function()
-    {
-        return false;
-    },
-
-    /**
-     * @override
-     */
-    jumpToNextSearchResult: function()
-    {
-        this._networkLogView.jumpToNextSearchResult();
-    },
-
-    /**
-     * @override
-     */
-    searchCanceled: function()
-    {
-        this._networkLogView.searchCanceled();
-    },
-
-    /**
-     * @override
-     * @param {!Event} event
-     * @param {!WebInspector.ContextMenu} contextMenu
-     * @param {!Object} target
      * @this {WebInspector.NetworkPanel}
      */
-    appendApplicableItems: function(event, contextMenu, target)
-    {
-        /**
-         * @this {WebInspector.NetworkPanel}
-         */
-        function reveal(request)
-        {
-            WebInspector.viewManager.showView("network").then(this.revealAndHighlightRequest.bind(this, request));
-        }
-
-        /**
-         * @this {WebInspector.NetworkPanel}
-         */
-        function appendRevealItem(request)
-        {
-            contextMenu.appendItem(WebInspector.UIString.capitalize("Reveal in Network ^panel"), reveal.bind(this, request));
-        }
-
-        if (event.target.isSelfOrDescendant(this.element))
-            return;
-
-        if (target instanceof WebInspector.Resource) {
-            var resource = /** @type {!WebInspector.Resource} */ (target);
-            if (resource.request)
-                appendRevealItem.call(this, resource.request);
-            return;
-        }
-        if (target instanceof WebInspector.UISourceCode) {
-            var uiSourceCode = /** @type {!WebInspector.UISourceCode} */ (target);
-            var resource = WebInspector.resourceForURL(uiSourceCode.url());
-            if (resource && resource.request)
-                appendRevealItem.call(this, resource.request);
-            return;
-        }
-
-        if (!(target instanceof WebInspector.NetworkRequest))
-            return;
-        var request = /** @type {!WebInspector.NetworkRequest} */ (target);
-        if (this._networkItemView && this._networkItemView.isShowing() && this._networkItemView.request() === request)
-            return;
-
-        appendRevealItem.call(this, request);
-    },
+    function reveal(request) {
+      WebInspector.viewManager.showView('network').then(this.revealAndHighlightRequest.bind(this, request));
+    }
 
     /**
-     * @param {!WebInspector.Event} event
+     * @this {WebInspector.NetworkPanel}
      */
-    _onFilmFrameSelected: function(event)
-    {
-        var timestamp = /** @type {number} */ (event.data);
-        this._overviewPane.requestWindowTimes(0, timestamp);
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onFilmFrameEnter: function(event)
-    {
-        var timestamp = /** @type {number} */ (event.data);
-        this._networkOverview.selectFilmStripFrame(timestamp);
-        this._networkLogView.selectFilmStripFrame(timestamp / 1000);
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onFilmFrameExit: function(event)
-    {
-        this._networkOverview.clearFilmStripFrame();
-        this._networkLogView.clearFilmStripFrame();
-    },
-
-    /**
-     * @param {!WebInspector.Event} event
-     */
-    _onUpdateRequest: function(event)
-    {
-        var request = /** @type {!WebInspector.NetworkRequest} */ (event.data);
-        this._calculator.updateBoundaries(request);
-        // FIXME: Unify all time units across the frontend!
-        this._overviewPane.setBounds(this._calculator.minimumBoundary() * 1000, this._calculator.maximumBoundary() * 1000);
-        this._networkOverview.updateRequest(request);
-        this._overviewPane.scheduleUpdate();
-    },
-
-    __proto__: WebInspector.Panel.prototype
+    function appendRevealItem(request) {
+      contextMenu.appendItem(WebInspector.UIString.capitalize('Reveal in Network ^panel'), reveal.bind(this, request));
+    }
+
+    if (event.target.isSelfOrDescendant(this.element))
+      return;
+
+    if (target instanceof WebInspector.Resource) {
+      var resource = /** @type {!WebInspector.Resource} */ (target);
+      if (resource.request)
+        appendRevealItem.call(this, resource.request);
+      return;
+    }
+    if (target instanceof WebInspector.UISourceCode) {
+      var uiSourceCode = /** @type {!WebInspector.UISourceCode} */ (target);
+      var resource = WebInspector.resourceForURL(uiSourceCode.url());
+      if (resource && resource.request)
+        appendRevealItem.call(this, resource.request);
+      return;
+    }
+
+    if (!(target instanceof WebInspector.NetworkRequest))
+      return;
+    var request = /** @type {!WebInspector.NetworkRequest} */ (target);
+    if (this._networkItemView && this._networkItemView.isShowing() && this._networkItemView.request() === request)
+      return;
+
+    appendRevealItem.call(this, request);
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _onFilmFrameSelected(event) {
+    var timestamp = /** @type {number} */ (event.data);
+    this._overviewPane.requestWindowTimes(0, timestamp);
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _onFilmFrameEnter(event) {
+    var timestamp = /** @type {number} */ (event.data);
+    this._networkOverview.selectFilmStripFrame(timestamp);
+    this._networkLogView.selectFilmStripFrame(timestamp / 1000);
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _onFilmFrameExit(event) {
+    this._networkOverview.clearFilmStripFrame();
+    this._networkLogView.clearFilmStripFrame();
+  }
+
+  /**
+   * @param {!WebInspector.Event} event
+   */
+  _onUpdateRequest(event) {
+    var request = /** @type {!WebInspector.NetworkRequest} */ (event.data);
+    this._calculator.updateBoundaries(request);
+    // FIXME: Unify all time units across the frontend!
+    this._overviewPane.setBounds(this._calculator.minimumBoundary() * 1000, this._calculator.maximumBoundary() * 1000);
+    this._networkOverview.updateRequest(request);
+    this._overviewPane.scheduleUpdate();
+  }
 };
 
+WebInspector.NetworkPanel.displayScreenshotDelay = 1000;
+
 /**
- * @constructor
  * @implements {WebInspector.ContextMenu.Provider}
+ * @unrestricted
  */
-WebInspector.NetworkPanel.ContextMenuProvider = function()
-{
+WebInspector.NetworkPanel.ContextMenuProvider = class {
+  /**
+   * @override
+   * @param {!Event} event
+   * @param {!WebInspector.ContextMenu} contextMenu
+   * @param {!Object} target
+   */
+  appendApplicableItems(event, contextMenu, target) {
+    WebInspector.NetworkPanel._instance().appendApplicableItems(event, contextMenu, target);
+  }
 };
 
-WebInspector.NetworkPanel.ContextMenuProvider.prototype = {
-    /**
-     * @override
-     * @param {!Event} event
-     * @param {!WebInspector.ContextMenu} contextMenu
-     * @param {!Object} target
-     */
-    appendApplicableItems: function(event, contextMenu, target)
-    {
-        WebInspector.NetworkPanel._instance().appendApplicableItems(event, contextMenu, target);
-    }
+/**
+ * @implements {WebInspector.Revealer}
+ * @unrestricted
+ */
+WebInspector.NetworkPanel.RequestRevealer = class {
+  /**
+   * @override
+   * @param {!Object} request
+   * @return {!Promise}
+   */
+  reveal(request) {
+    if (!(request instanceof WebInspector.NetworkRequest))
+      return Promise.reject(new Error('Internal error: not a network request'));
+    var panel = WebInspector.NetworkPanel._instance();
+    return WebInspector.viewManager.showView('network').then(panel.revealAndHighlightRequest.bind(panel, request));
+  }
 };
 
+
 /**
- * @constructor
- * @implements {WebInspector.Revealer}
+ * @implements {WebInspector.TracingManagerClient}
+ * @unrestricted
  */
-WebInspector.NetworkPanel.RequestRevealer = function()
-{
-};
-
-WebInspector.NetworkPanel.RequestRevealer.prototype = {
-    /**
-     * @override
-     * @param {!Object} request
-     * @return {!Promise}
-     */
-    reveal: function(request)
-    {
-        if (!(request instanceof WebInspector.NetworkRequest))
-            return Promise.reject(new Error("Internal error: not a network request"));
-        var panel = WebInspector.NetworkPanel._instance();
-        return WebInspector.viewManager.showView("network").then(panel.revealAndHighlightRequest.bind(panel, request));
-    }
-};
-
-/**
- * @param {!Array<{filterType: !WebInspector.NetworkLogView.FilterType, filterValue: string}>} filters
- */
-WebInspector.NetworkPanel.revealAndFilter = function(filters)
-{
-    var panel = WebInspector.NetworkPanel._instance();
-    var filterString = "";
-    for (var filter of filters)
-        filterString += `${filter.filterType}:${filter.filterValue} `;
-    panel._networkLogView.setTextFilterValue(filterString);
-    WebInspector.viewManager.showView("network");
-};
-
-/**
- * @return {!WebInspector.NetworkPanel}
- */
-WebInspector.NetworkPanel._instance = function()
-{
-    return /** @type {!WebInspector.NetworkPanel} */ (self.runtime.sharedInstance(WebInspector.NetworkPanel));
-};
-
-/**
- * @constructor
- * @implements {WebInspector.TracingManagerClient}
- * @param {!WebInspector.NetworkTimeCalculator} timeCalculator
- * @param {!WebInspector.FilmStripView} filmStripView
- */
-WebInspector.NetworkPanel.FilmStripRecorder = function(timeCalculator, filmStripView)
-{
+WebInspector.NetworkPanel.FilmStripRecorder = class {
+  /**
+   * @param {!WebInspector.NetworkTimeCalculator} timeCalculator
+   * @param {!WebInspector.FilmStripView} filmStripView
+   */
+  constructor(timeCalculator, filmStripView) {
     this._timeCalculator = timeCalculator;
     this._filmStripView = filmStripView;
+  }
+
+  /**
+   * @override
+   */
+  tracingStarted() {
+  }
+
+  /**
+   * @override
+   * @param {!Array.<!WebInspector.TracingManager.EventPayload>} events
+   */
+  traceEventsCollected(events) {
+    if (this._tracingModel)
+      this._tracingModel.addEvents(events);
+  }
+
+  /**
+   * @override
+   */
+  tracingComplete() {
+    if (!this._tracingModel)
+      return;
+    this._tracingModel.tracingComplete();
+    WebInspector.targetManager.resumeReload(this._target);
+    this._target = null;
+    this._callback(new WebInspector.FilmStripModel(this._tracingModel, this._timeCalculator.minimumBoundary() * 1000));
+    delete this._callback;
+  }
+
+  /**
+   * @override
+   */
+  tracingBufferUsage() {
+  }
+
+  /**
+   * @override
+   * @param {number} progress
+   */
+  eventsRetrievalProgress(progress) {
+  }
+
+  startRecording() {
+    this._filmStripView.reset();
+    this._filmStripView.setStatusText(WebInspector.UIString('Recording frames...'));
+    if (this._target)
+      return;
+
+    this._target = WebInspector.targetManager.mainTarget();
+    if (this._tracingModel)
+      this._tracingModel.reset();
+    else
+      this._tracingModel = new WebInspector.TracingModel(new WebInspector.TempFileBackingStorage('tracing'));
+    this._target.tracingManager.start(this, '-*,disabled-by-default-devtools.screenshot', '');
+  }
+
+  /**
+   * @return {boolean}
+   */
+  isRecording() {
+    return !!this._target;
+  }
+
+  /**
+   * @param {function(?WebInspector.FilmStripModel)} callback
+   */
+  stopRecording(callback) {
+    if (!this._target)
+      return;
+
+    this._target.tracingManager.stop();
+    WebInspector.targetManager.suspendReload(this._target);
+    this._callback = callback;
+    this._filmStripView.setStatusText(WebInspector.UIString('Fetching frames...'));
+  }
 };
 
-WebInspector.NetworkPanel.FilmStripRecorder.prototype = {
-    /**
-     * @override
-     */
-    tracingStarted: function()
-    {
-    },
-
-    /**
-     * @override
-     * @param {!Array.<!WebInspector.TracingManager.EventPayload>} events
-     */
-    traceEventsCollected: function(events)
-    {
-        if (this._tracingModel)
-            this._tracingModel.addEvents(events);
-    },
-
-    /**
-     * @override
-     */
-    tracingComplete: function()
-    {
-        if (!this._tracingModel)
-            return;
-        this._tracingModel.tracingComplete();
-        WebInspector.targetManager.resumeReload(this._target);
-        this._target = null;
-        this._callback(new WebInspector.FilmStripModel(this._tracingModel, this._timeCalculator.minimumBoundary() * 1000));
-        delete this._callback;
-    },
-
-    /**
-     * @override
-     */
-    tracingBufferUsage: function()
-    {
-    },
-
-    /**
-     * @override
-     * @param {number} progress
-     */
-    eventsRetrievalProgress: function(progress)
-    {
-    },
-
-    startRecording: function()
-    {
-        this._filmStripView.reset();
-        this._filmStripView.setStatusText(WebInspector.UIString("Recording frames..."));
-        if (this._target)
-            return;
-
-        this._target = WebInspector.targetManager.mainTarget();
-        if (this._tracingModel)
-            this._tracingModel.reset();
-        else
-            this._tracingModel = new WebInspector.TracingModel(new WebInspector.TempFileBackingStorage("tracing"));
-        this._target.tracingManager.start(this, "-*,disabled-by-default-devtools.screenshot", "");
-    },
-
-    /**
-     * @return {boolean}
-     */
-    isRecording: function()
-    {
-        return !!this._target;
-    },
-
-    /**
-     * @param {function(?WebInspector.FilmStripModel)} callback
-     */
-    stopRecording: function(callback)
-    {
-        if (!this._target)
-            return;
-
-        this._target.tracingManager.stop();
-        WebInspector.targetManager.suspendReload(this._target);
-        this._callback = callback;
-        this._filmStripView.setStatusText(WebInspector.UIString("Fetching frames..."));
-    }
+/**
+ * @implements {WebInspector.ActionDelegate}
+ * @unrestricted
+ */
+WebInspector.NetworkPanel.RecordActionDelegate = class {
+  /**
+   * @override
+   * @param {!WebInspector.Context} context
+   * @param {string} actionId
+   * @return {boolean}
+   */
+  handleAction(context, actionId) {
+    var panel = WebInspector.context.flavor(WebInspector.NetworkPanel);
+    console.assert(panel && panel instanceof WebInspector.NetworkPanel);
+    panel._toggleRecording();
+    return true;
+  }
 };
-
-/**
- * @constructor
- * @implements {WebInspector.ActionDelegate}
- */
-WebInspector.NetworkPanel.RecordActionDelegate = function()
-{
-};
-WebInspector.NetworkPanel.RecordActionDelegate.prototype = {
-    /**
-     * @override
-     * @param {!WebInspector.Context} context
-     * @param {string} actionId
-     * @return {boolean}
-     */
-    handleAction: function(context, actionId)
-    {
-        var panel = WebInspector.context.flavor(WebInspector.NetworkPanel);
-        console.assert(panel && panel instanceof WebInspector.NetworkPanel);
-        panel._toggleRecording();
-        return true;
-    }
-};