Undo some unintended changes from the Turbofan merge

src/types.h

Index: src/types.h
diff --git a/src/types.h b/src/types.h
index 98b9e014c7988bb4c0f6f3db34d21fe4389698bc..f141712bb84f09c5e58124174517eadc7a2241f6 100644
--- a/src/types.h
+++ b/src/types.h
@@ -7,12 +7,11 @@
 
 #include "src/factory.h"
 #include "src/handles.h"
+#include "src/ostreams.h"
 
 namespace v8 {
 namespace internal {
 
-class OStream;
-
 // SUMMARY
 //
 // A simple type system for compiler-internal use. It is based entirely on
@@ -512,6 +511,8 @@ class TypeImpl<Config>::BitsetType : public TypeImpl<Config> {
   static int Lub(TypeImpl* type);  // least upper bound that's a bitset
   static int Lub(i::Object* value);
   static int Lub(double value);
+  static int Lub(int32_t value);
+  static int Lub(uint32_t value);
   static int Lub(i::Map* map);
   static int InherentLub(TypeImpl* type);