: true});
        Polymer.dom(this).appendChild(track);
      }
    },

    appendAllocatedMemoryTrack_() {
      const series = tr.ui.tracks.buildGlobalAllocatedMemoryChartSeries(
          this.memoryDumps_);
      if (!series) return;

      const track = new tr.ui.tracks.ChartTrack(this.viewport);
      track.heading = 'Memory per component';
      track.height = ALLOCATED_MEMORY_TRACK_HEIGHT + 'px';
      track.series = series;
      track.autoSetAllAxes({expandMax: true});
      Polymer.dom(this).appe