Hydrogen: fix keyed loads with string keys

src/type-info.h

Index: src/type-info.h
diff --git a/src/type-info.h b/src/type-info.h
index e0f7394c7c605d10f35bd827ecb39e6d182513cc..9753ff06d9a519c44e912cb116864d92a5f40e6b 100644
--- a/src/type-info.h
+++ b/src/type-info.h
@@ -40,6 +40,7 @@ class TypeFeedbackOracle: public ZoneObject {
   void GetStoreModeAndKeyType(TypeFeedbackId id,
                               KeyedAccessStoreMode* store_mode,
                               IcCheckType* key_type);
+  void GetLoadKeyType(TypeFeedbackId id, IcCheckType* key_type);
 
   void PropertyReceiverTypes(TypeFeedbackId id, Handle<String> name,
                              SmallMapList* receiver_types);
@@ -47,7 +48,8 @@ class TypeFeedbackOracle: public ZoneObject {
                              SmallMapList* receiver_types);
   void KeyedPropertyReceiverTypes(TypeFeedbackId id,
                                   SmallMapList* receiver_types,
-                                  bool* is_string);
+                                  bool* is_string,
+                                  IcCheckType* key_type);
   void KeyedPropertyReceiverTypes(FeedbackVectorICSlot slot,
                                   SmallMapList* receiver_types,
                                   bool* is_string);