Expose SIMD.Float32x4 type to Javascript.

test/cctest/test-heap-profiler.cc

Index: test/cctest/test-heap-profiler.cc
diff --git a/test/cctest/test-heap-profiler.cc b/test/cctest/test-heap-profiler.cc
index 6fa8ede57bd8d6537832ac3445026c230bb8cfff..5d3310ef59d529a6ddef19ec09854249a5fa1464 100644
--- a/test/cctest/test-heap-profiler.cc
+++ b/test/cctest/test-heap-profiler.cc
@@ -482,6 +482,23 @@ TEST(HeapSnapshotSymbol) {
 }
 
 
+TEST(HeapSnapshotFloat32x4) {
+  i::FLAG_harmony_simd = true;
+  LocalContext env;
+  v8::HandleScope scope(env->GetIsolate());
+  v8::HeapProfiler* heap_profiler = env->GetIsolate()->GetHeapProfiler();
+
+  CompileRun("a = SIMD.float32x4(1, 2, 3, 4);\n");
+  const v8::HeapSnapshot* snapshot = heap_profiler->TakeHeapSnapshot();
+  CHECK(ValidateSnapshot(snapshot));
+  const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
+  const v8::HeapGraphNode* a =
+      GetProperty(global, v8::HeapGraphEdge::kProperty, "a");
+  CHECK(a);
+  CHECK_EQ(a->GetType(), v8::HeapGraphNode::kSimdValue);
+}
+
+
 TEST(HeapSnapshotWeakCollection) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());