Add new Float32x4 type for SIMD.js.

src/heap-snapshot-generator.h

Index: src/heap-snapshot-generator.h
diff --git a/src/heap-snapshot-generator.h b/src/heap-snapshot-generator.h
index 5859eb88b5d35b3c42d7a43cd834639e8356bf7f..ed0ca898394ae6d01556f5822ad14758d29d6a41 100644
--- a/src/heap-snapshot-generator.h
+++ b/src/heap-snapshot-generator.h
@@ -82,7 +82,8 @@ class HeapEntry BASE_EMBEDDED {
     kSynthetic = v8::HeapGraphNode::kSynthetic,
     kConsString = v8::HeapGraphNode::kConsString,
     kSlicedString = v8::HeapGraphNode::kSlicedString,
-    kSymbol = v8::HeapGraphNode::kSymbol
+    kSymbol = v8::HeapGraphNode::kSymbol,
+    kSimdValue = v8::HeapGraphNode::kSimdValue
   };
   static const int kNoEntry;