DevTools: Remove unused variables. Disallow unused variables with eslint

third_party/WebKit/Source/devtools/front_end/timeline/TimelineUIUtils.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 975 matching lines @@
     return contentHelper.fragment;
   }
 
   /**
    * @param {!TimelineModel.TimelineModel.Record} record
    * @param {number} startTime
    * @param {number} endTime
    * @param {!Object} aggregatedStats
    */
   static _collectAggregatedStatsForRecord(record, startTime, endTime, aggregatedStats) {
-    var records = [];
-
     if (!record.endTime() || record.endTime() < startTime || record.startTime() > endTime)
       return;
 
     var childrenTime = 0;
     var children = record.children() || [];
     for (var i = 0; i < children.length; ++i) {
       var child = children[i];
       if (!child.endTime() || child.endTime() < startTime || child.startTime() > endTime)
         continue;
       childrenTime += Math.min(endTime, child.endTime()) - Math.max(startTime, child.startTime());
       Timeline.TimelineUIUtils._collectAggregatedStatsForRecord(child, startTime, endTime, aggregatedStats);
     }
     var categoryName = Timeline.TimelineUIUtils.categoryForRecord(record).name;
     var ownTime = Math.min(endTime, record.endTime()) - Math.max(startTime, record.startTime()) - childrenTime;
     aggregatedStats[categoryName] = (aggregatedStats[categoryName] || 0) + ownTime;
   }
 
   /**
    * @param {!TimelineModel.TimelineModel.NetworkRequest} request
    * @param {!TimelineModel.TimelineModel} model
    * @param {!Components.Linkifier} linkifier
    * @return {!Promise<!DocumentFragment>}
    */
   static buildNetworkRequestDetails(request, model, linkifier) {
     var target = model.targetByEvent(request.children[0]);
     var contentHelper = new Timeline.TimelineDetailsContentHelper(target, linkifier);
 
     var duration = request.endTime - (request.startTime || -Infinity);
-    var items = [];
     if (request.url)
       contentHelper.appendElementRow(Common.UIString('URL'), Components.Linkifier.linkifyURL(request.url));
     if (isFinite(duration))
       contentHelper.appendTextRow(Common.UIString('Duration'), Number.millisToString(duration, true));
     if (request.requestMethod)
       contentHelper.appendTextRow(Common.UIString('Request Method'), request.requestMethod);
     if (typeof request.priority === 'string') {
       var priority =
           Components.uiLabelForPriority(/** @type {!Protocol.Network.ResourcePriority} */ (request.priority));
       contentHelper.appendTextRow(Common.UIString('Priority'), priority);
@@ skipping 467 matching lines @@
     return element;
   }
 
   /**
    * @param {!TimelineModel.TimelineFrameModel} frameModel
    * @param {!TimelineModel.TimelineFrame} frame
    * @param {?Components.FilmStripModel.Frame} filmStripFrame
    * @return {!Element}
    */
   static generateDetailsContentForFrame(frameModel, frame, filmStripFrame) {
-    var pieChart = Timeline.TimelineUIUtils.generatePieChart(frame.timeByCategory);
     var contentHelper = new Timeline.TimelineDetailsContentHelper(null, null);
     contentHelper.addSection(Common.UIString('Frame'));
 
     var duration = Timeline.TimelineUIUtils.frameDuration(frame);
     contentHelper.appendElementRow(Common.UIString('Duration'), duration, frame.hasWarnings());
     if (filmStripFrame) {
       var filmStripPreview = createElementWithClass('img', 'timeline-filmstrip-preview');
       filmStripFrame.imageDataPromise().then(onGotImageData.bind(null, filmStripPreview));
       contentHelper.appendElementRow('', filmStripPreview);
       filmStripPreview.addEventListener('click', frameClicked.bind(null, filmStripFrame), false);
@@ skipping 714 matching lines @@
   /**
    * @param {!SDK.TracingModel.Event} event
    * @param {string=} warningType
    */
   appendWarningRow(event, warningType) {
     var warning = Timeline.TimelineUIUtils.eventWarning(event, warningType);
     if (warning)
       this.appendElementRow(Common.UIString('Warning'), warning, true);
   }
 };