Flatten the Arrays returned and consumed by the v8::Map API

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 6ecdb4d4a207a2bcc6308d99773d363252456073..985daacef4d2175280681a3174cf9a5f2332b03b 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -6272,17 +6272,13 @@ Local<Array> Map::AsArray() const {
   LOG_API(isolate, "Map::AsArray");
   ENTER_V8(isolate);
   i::Handle<i::OrderedHashMap> table(i::OrderedHashMap::cast(obj->table()));
-  int length = table->NumberOfElements();
+  int size = table->NumberOfElements();
+  int length = size * 2;
   i::Handle<i::FixedArray> result = factory->NewFixedArray(length);
-  for (int i = 0; i < length; ++i) {
+  for (int i = 0; i < size; ++i) {
     if (table->KeyAt(i)->IsTheHole()) continue;
-    i::HandleScope handle_scope(isolate);
-    i::Handle<i::FixedArray> entry = factory->NewFixedArray(2);
-    entry->set(0, table->KeyAt(i));
-    entry->set(1, table->ValueAt(i));
-    i::Handle<i::JSArray> entry_array =
-        factory->NewJSArrayWithElements(entry, i::FAST_ELEMENTS, 2);
-    result->set(i, *entry_array);
+    result->set(i * 2, table->KeyAt(i));
+    result->set(i * 2 + 1, table->ValueAt(i));
   }
   i::Handle<i::JSArray> result_array =
       factory->NewJSArrayWithElements(result, i::FAST_ELEMENTS, length);