Revert of Adding gantt chart to Build Status page on Buildbot Masters

masters/master.tryserver.chromium.linux/public_html/gantt_chart.js

-// Copyright 2016 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.
-google.charts.load('current', {'packages':['gantt']});
-
-/**
- * reconcileSwarmingSteps reconciles a Swarming step's "trigger" step with
- * it's subsequent "collect results" step.
- *
- * Swarming steps in BuildBot create two steps - one to trigger the work
- * on swarming, and a later step to collect the results.
- *
- * The two steps have the same name, except the trigger step has "[trigger] "
- * prepended to the name.
- *
- * This function consolidates the two steps into one by using the start
- * time from the trigger step and the end time from the "collect results"
- * step.
- *
- * This function assumes that a trigger step will be found before the
- * corresponding "collect results" step in the list of steps.
- * @param {Array<Object>} steps List of step objects. Each step object
- *     has the following properties: name {string}, start {Date}, end {Date}
- */
-function reconcileSwarmingSteps(steps) {
-  let reconciledSteps = [];
-  let triggerSteps = {};
-
-  for (let s of steps) {
-    // trigger steps have names like "[trigger] TheRestOfTheNameGoesHere..."
-    let isTriggerStep = /\[trigger\] (.*)/.exec(s.name);
-    if (isTriggerStep) {
-      triggerSteps[isTriggerStep[1]] = s;
-    } else {
-      if (triggerSteps[s.name]) {
-        s.start = triggerSteps[s.name].start;
-      }
-      reconciledSteps.push(s);
-    }
-  }
-
-  return reconciledSteps;
-};
-
-function drawChart(steps) {
-  let data = new google.visualization.DataTable();
-  data.addColumn('string', 'Task ID');
-  data.addColumn('string', 'Task Name');
-  data.addColumn('string', 'Resource');
-  data.addColumn('date', 'Start Date');
-  data.addColumn('date', 'End Date');
-  data.addColumn('number', 'Duration');
-  data.addColumn('number', 'Percent Complete');
-  data.addColumn('string', 'Dependencies');
-
-  for (s of steps) {
-    data.addRow([s.name, s.name, null, s.start, s.end, null, 100, null]);
-  }
-
-  let trackHeight = 25;
-  let options = {
-    height: data.getNumberOfRows() * trackHeight,
-    gantt: {
-      trackHeight: trackHeight,
-      barHeight: trackHeight * 0.8,
-      labelMaxWidth: 500,
-    }
-  };
-
-  let chart = new google.visualization.Gantt(
-      document.getElementById('chart_div'));
-  chart.draw(data, options);
-}
-
-let chartVisible = false;
-function toggleChart(rawSteps) {
-  if (chartVisible) {
-    document.getElementById('chart_div').style.display = 'none';
-    chartVisible = false;
-  } else {
-    document.getElementById('chart_div').style.display = 'block';
-    let steps = reconcileSwarmingSteps(rawSteps);
-    drawChart(steps);
-    chartVisible = true;
-  }
-}