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

tools/turbolizer/node.js

 // Copyright 2014 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_WIDTH = 240;
-var DEFAULT_NODE_HEIGHT = 40;
 var TYPE_HEIGHT = 25;
-var DEFAULT_NODE_BUBBLE_RADIUS = 4;
-var NODE_INPUT_WIDTH = 20;
-var MINIMUM_NODE_INPUT_APPROACH = 20;
+var DEFAULT_NODE_BUBBLE_RADIUS = 12;
+var NODE_INPUT_WIDTH = 50;
+var MINIMUM_NODE_INPUT_APPROACH = 15 + 2 * DEFAULT_NODE_BUBBLE_RADIUS;
 var MINIMUM_NODE_OUTPUT_APPROACH = 15;
 
 function isNodeInitiallyVisible(node) {
   return node.cfg;
 }
 
 var Node = {
   isControl: function() {
     return this.control;
   },
   isInput: function() {
     return this.opcode == 'Parameter' || this.opcode.endsWith('Constant');
   },
   isLive: function() {
-    return this.live;
+    return this.live !== false;
   },
   isJavaScript: function() {
     return this.opcode.startsWith('JS');
   },
   isSimplified: function() {
     if (this.isJavaScript) return false;
     return this.opcode.endsWith('Phi') ||
       this.opcode.startsWith('Boolean') ||
       this.opcode.startsWith('Number') ||
       this.opcode.startsWith('String') ||
@@ skipping 84 matching lines @@
         return true;
       }
     }
     return false;
   },
   getInputApproach: function(index) {
     return this.y - MINIMUM_NODE_INPUT_APPROACH -
       (index % 4) * MINIMUM_EDGE_SEPARATION - DEFAULT_NODE_BUBBLE_RADIUS
   },
   getOutputApproach: function(graph, index) {
-    return this.y + this.outputApproach + graph.getNodeHeight() +
+    return this.y + this.outputApproach + graph.getNodeHeight(this) +
       + DEFAULT_NODE_BUBBLE_RADIUS;
   },
   getInputX: function(index) {
     var result = this.getTotalNodeWidth() - (NODE_INPUT_WIDTH / 2) +
         (index - this.inputs.length + 1) * NODE_INPUT_WIDTH;
     return result;
   },
   getOutputX: function() {
     return this.getTotalNodeWidth() - (NODE_INPUT_WIDTH / 2);
   },
   getFunctionRelativeSourcePosition: function(graph) {
     return this.pos - graph.sourcePosition;
   },
   hasBackEdges: function() {
     return (this.opcode == "Loop") ||
       ((this.opcode == "Phi" || this.opcode == "EffectPhi") &&
        this.inputs[this.inputs.length - 1].source.opcode == "Loop");
   }
 };