his, viewport);
      this.memoryDumps_ = undefined;
    },

    get memoryDumps() {
      return this.memoryDumps_;
    },

    set memoryDumps(memoryDumps) {
      this.memoryDumps_ = memoryDumps;
      this.updateContents_();
    },

    updateContents_() {
      this.clearTracks_();

      // Show no tracks if there are no dumps.
      if (!this.memoryDumps_ || !this.memoryDumps_.length) return;

      this.appendDumpDotsTrack_();
      this.appendUsedMemoryTrack_();
      this.appendAllocatedMemoryTrac