Add experimental, non-snapshotted V8 extras

src/snapshot/natives.h

Index: src/snapshot/natives.h
diff --git a/src/snapshot/natives.h b/src/snapshot/natives.h
index 1efaf7ece5da4b7bba5c368c33252f58f7f75c16..c923a0f353bb1bc6dc59f7f5e4e80a16e86172a5 100644
--- a/src/snapshot/natives.h
+++ b/src/snapshot/natives.h
@@ -13,7 +13,15 @@ namespace v8 { class StartupData; }  // Forward declaration.
 namespace v8 {
 namespace internal {
 
-enum NativeType { CORE, CODE_STUB, EXPERIMENTAL, EXTRAS, D8, TEST };
+enum NativeType {
+  CORE,
+  CODE_STUB,
+  EXPERIMENTAL,
+  EXTRAS,
+  EXPERIMENTAL_EXTRAS,
+  D8,
+  TEST
+};
 
 template <NativeType type>
 class NativesCollection {
@@ -44,6 +52,7 @@ typedef NativesCollection<CORE> Natives;
 typedef NativesCollection<CODE_STUB> CodeStubNatives;
 typedef NativesCollection<EXPERIMENTAL> ExperimentalNatives;
 typedef NativesCollection<EXTRAS> ExtraNatives;
+typedef NativesCollection<EXPERIMENTAL_EXTRAS> ExperimentalExtraNatives;
 
 
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA