Add a html-based visualizer for TurboFan graphs

tools/turbolizer/view.js

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+"use strict";
+
+class View {
+  constructor(id, broker) {
+    this.divElement = d3.select("#" + id);
+    this.divNode = this.divElement[0][0];
+    this.parentNode = this.divNode.parentNode;
+    this.hide();
+  }
+
+  isScrollable() {
+    return false;
+  }
+
+  show(data, rememberedSelection) {
+    this.parentNode.appendChild(this.divElement[0][0]);
+    this.initializeContent(data, rememberedSelection);
+    this.resizeToParent();
+    this.divElement.attr(VISIBILITY, 'visible');
+  }
+
+  resizeToParent() {
+    var view = this;
+    var documentElement = document.documentElement;
+    var y = this.parentNode.clientHeight || documentElement.clientHeight;
+    this.parentNode.style.height = y + 'px';
+  }
+
+  hide() {
+    this.divElement.attr(VISIBILITY, 'hidden');
+    this.deleteContent();
+    this.parentNode.removeChild(this.divNode);
+  }
+
+  detachSelection() {
+    return null;
+  }
+}