[turbolizer] Enlarge node labels and bubbles. Fix dead node display on old JSON.

tools/turbolizer/graph-layout.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.
 
 var DEFAULT_NODE_ROW_SEPARATION = 130
 
 var traceLayout = false;
 
 function newGraphOccupation(graph){
   var isSlotFilled = [];
@@ skipping 353 matching lines @@
   }
   startNodes.forEach(dfsRankOrder);
 
   endNodes.forEach(function(n) {
     n.rank = maxRank + 1;
   });
 
   var rankSets = [];
   // Collect sets for each rank.
   graph.nodes.forEach(function(n, i){
-    n.y = n.rank * (DEFAULT_NODE_ROW_SEPARATION + graph.getNodeHeight() +
+    n.y = n.rank * (DEFAULT_NODE_ROW_SEPARATION + graph.getNodeHeight(n) +
                     2 * DEFAULT_NODE_BUBBLE_RADIUS);
     if (n.visible) {
       if (rankSets[n.rank] === undefined) {
         rankSets[n.rank] = [n];
       } else {
         rankSets[n.rank].push(n);
       }
     }
   });
 
@@ skipping 90 matching lines @@
 
     if (node.x < graph.minGraphX) {
       graph.minGraphX = node.x;
     }
     if ((node.x + node.getTotalNodeWidth()) > graph.maxGraphNodeX) {
       graph.maxGraphNodeX = node.x + node.getTotalNodeWidth();
     }
     if ((node.y - 50) < graph.minGraphY) {
       graph.minGraphY = node.y - 50;
     }
-    if ((node.y + graph.getNodeHeight() + 50) > graph.maxGraphY) {
-      graph.maxGraphY = node.y + graph.getNodeHeight() + 50;
+    if ((node.y + graph.getNodeHeight(node) + 50) > graph.maxGraphY) {
+      graph.maxGraphY = node.y + graph.getNodeHeight(node) + 50;
     }
   }
 
   graph.maxGraphX = graph.maxGraphNodeX +
     graph.maxBackEdgeNumber * MINIMUM_EDGE_SEPARATION;
 
 }