Replace SetObjectProperty / DefineObjectProperty with less powerful alternatives where relevant.

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 1158 matching lines @@
 
   MUST_USE_RESULT static MaybeHandle<Object> SetSuperProperty(
       LookupIterator* it, Handle<Object> value, LanguageMode language_mode,
       StoreFromKeyed store_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,
       Handle<Object> value, LanguageMode language_mode);
-  MUST_USE_RESULT static MaybeHandle<Object> WriteToReadOnlyElement(
-      Isolate* isolate, Handle<Object> receiver, uint32_t index,
-      Handle<Object> value, LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> RedefineNonconfigurableProperty(
       Isolate* isolate, Handle<Object> name, Handle<Object> value,
       LanguageMode language_mode);
   MUST_USE_RESULT static MaybeHandle<Object> SetDataProperty(
       LookupIterator* it, Handle<Object> value);
   MUST_USE_RESULT static MaybeHandle<Object> AddDataProperty(
       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);
@@ skipping 642 matching lines @@
                                                uint32_t limit);
   // As PrepareElementsForSort, but only on objects where elements is
   // a dictionary, and it will stay a dictionary.  Collates undefined and
   // unexisting elements below limit from position zero of the elements.
   static Handle<Object> PrepareSlowElementsForSort(Handle<JSObject> object,
                                                    uint32_t limit);
 
   MUST_USE_RESULT static MaybeHandle<Object> SetPropertyWithInterceptor(
       LookupIterator* it, Handle<Object> value);
 
+  // Calls SetOwn[Property|Element]IgnoreAttributes depending on whether name is
+  // convertible to an index.
+  MUST_USE_RESULT static inline MaybeHandle<Object> DefinePropertyOrElement(
+      Handle<JSObject> object, Handle<Name> name, Handle<Object> value,
+      PropertyAttributes attributes = NONE);
+
   MUST_USE_RESULT static MaybeHandle<Object> SetOwnPropertyIgnoreAttributes(
       Handle<JSObject> object, Handle<Name> name, Handle<Object> value,
       PropertyAttributes attributes);
 
   MUST_USE_RESULT static MaybeHandle<Object> SetOwnElementIgnoreAttributes(
       Handle<JSObject> object, uint32_t index, Handle<Object> value,
       PropertyAttributes attributes);
 
   MUST_USE_RESULT static MaybeHandle<Object> ReconfigureAsDataProperty(
       LookupIterator* it, Handle<Object> value, PropertyAttributes attributes);
@@ skipping 2184 matching lines @@
 
   // Lookup support for serialized scope info.  Returns the receiver context
   // slot index if scope has a "this" binding, and the binding is
   // context-allocated.  Otherwise returns a value < 0.
   int ReceiverContextSlotIndex();
 
   bool block_scope_is_class_scope();
   FunctionKind function_kind();
 
   // Copies all the context locals into an object used to materialize a scope.
-  static bool CopyContextLocalsToScopeObject(Handle<ScopeInfo> scope_info,
+  static void CopyContextLocalsToScopeObject(Handle<ScopeInfo> scope_info,
                                              Handle<Context> context,
                                              Handle<JSObject> scope_object);
 
 
   static Handle<ScopeInfo> Create(Isolate* isolate, Zone* zone, Scope* scope);
 
   // Serializes empty scope info.
   static ScopeInfo* Empty(Isolate* isolate);
 
 #ifdef DEBUG
@@ skipping 6781 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_