[turbolizer] Remember the last phase, search query, and pane expansions.

tools/turbolizer/graph-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 GraphView extends View {
   constructor (d3, id, nodes, edges, broker) {
     super(id, broker);
     var graph = this;
@@ skipping 492 matching lines @@
     graph.viewSelection();
   }
 
   toggleTypesAction(graph) {
     graph.toggleTypes();
   }
 
   searchInputAction(graph) {
     if (d3.event.keyCode == 13) {
       graph.state.selection.clear();
-      var reg = new RegExp(this.value);
+      var query = this.value;
+      window.sessionStorage.setItem("lastSearch", query);
+
+      var reg = new RegExp(query);
       var filterFunction = function(n) {
         return (reg.exec(n.getDisplayLabel()) != null ||
                 (graph.state.showTypes && reg.exec(n.getDisplayType())) ||
                 reg.exec(n.opcode) != null);
       };
       if (d3.event.ctrlKey) {
         graph.nodes.forEach(function(n, i) {
           if (filterFunction(n)) {
             n.visible = true;
           }
@@ skipping 463 matching lines @@
   }
 
   viewWholeGraph() {
     var graph = this;
     var minScale = graph.minScale();
     var translation = [0, 0];
     translation = graph.getVisibleTranslation(translation, minScale);
     graph.translateClipped(translation, minScale);
   }
 }