[strong] Implement strong property access semantics

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 70e219390964376ad583cc952b9d61d87fe6a58b..ac101e5579cc25465f6cb45647f8e183898d1bdb 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1168,7 +1168,8 @@ class Object {
   MUST_USE_RESULT static inline MaybeHandle<Smi> ToSmi(Isolate* isolate,
                                                        Handle<Object> object);
 
-  MUST_USE_RESULT static MaybeHandle<Object> GetProperty(LookupIterator* it);
+  MUST_USE_RESULT static MaybeHandle<Object> GetProperty(
+      LookupIterator* it, LanguageMode language_mode = SLOPPY);
 
   // Implementation of [[Put]], ECMA-262 5th edition, section 8.12.5.
   MUST_USE_RESULT static MaybeHandle<Object> SetProperty(
@@ -1184,10 +1185,15 @@ class Object {
       LookupIterator* it, Handle<Object> value, LanguageMode language_mode,
       StoreFromKeyed store_mode);
 
+  MUST_USE_RESULT static MaybeHandle<Object> ReadAbsentProperty(
+      LookupIterator* it, LanguageMode language_mode);
+  MUST_USE_RESULT static MaybeHandle<Object> ReadAbsentProperty(
+      Isolate* isolate, Handle<Object> receiver, Handle<Object> name,
+      LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> WriteToReadOnlyProperty(
       LookupIterator* it, Handle<Object> value, LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> WriteToReadOnlyProperty(
-      Isolate* isolate, Handle<Object> reciever, Handle<Object> name,
+      Isolate* isolate, Handle<Object> receiver, Handle<Object> name,
       Handle<Object> value, LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> RedefineNonconfigurableProperty(
       Isolate* isolate, Handle<Object> name, Handle<Object> value,
@@ -1198,16 +1204,17 @@ class Object {
       LookupIterator* it, Handle<Object> value, PropertyAttributes attributes,
       LanguageMode language_mode, StoreFromKeyed store_mode);
   MUST_USE_RESULT static inline MaybeHandle<Object> GetPropertyOrElement(
-      Handle<Object> object, Handle<Name> name);
+      Handle<Object> object, Handle<Name> name,
+      LanguageMode language_mode = SLOPPY);
   MUST_USE_RESULT static inline MaybeHandle<Object> GetProperty(
-      Isolate* isolate,
-      Handle<Object> object,
-      const char* key);
+      Isolate* isolate, Handle<Object> object, const char* key,
+      LanguageMode language_mode = SLOPPY);
   MUST_USE_RESULT static inline MaybeHandle<Object> GetProperty(
-      Handle<Object> object, Handle<Name> name);
+      Handle<Object> object, Handle<Name> name,
+      LanguageMode language_mode = SLOPPY);
 
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithAccessor(
-      LookupIterator* it);
+      LookupIterator* it, LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> SetPropertyWithAccessor(
       LookupIterator* it, Handle<Object> value, LanguageMode language_mode);
 
@@ -1220,9 +1227,8 @@ class Object {
       Handle<Object> value);
 
   MUST_USE_RESULT static inline MaybeHandle<Object> GetElement(
-      Isolate* isolate,
-      Handle<Object> object,
-      uint32_t index);
+      Isolate* isolate, Handle<Object> object, uint32_t index,
+      LanguageMode language_mode = SLOPPY);
 
   static inline Handle<Object> GetPrototypeSkipHiddenPrototypes(
       Isolate* isolate, Handle<Object> receiver);