Replace SetObjectProperty / DefineObjectProperty with less powerful alternatives where relevant.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index b8812800081d1b36ea84b5871c2a80a8d870bb93..0bd435b738b64bb11e3d6a586e7a2217f04fdbdf 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -3535,7 +3535,7 @@ Maybe<bool> v8::Object::CreateDataProperty(v8::Local<v8::Context> context,
 
   if (it.IsFound() && !it.IsConfigurable()) return Just(false);
 
-  has_pending_exception = i::Runtime::DefineObjectProperty(
+  has_pending_exception = i::JSObject::SetOwnPropertyIgnoreAttributes(
                               self, key_obj, value_obj, NONE).is_null();
   RETURN_ON_FAILED_EXECUTION_PRIMITIVE(bool);
   return Just(true);
@@ -3573,9 +3573,8 @@ Maybe<bool> v8::Object::CreateDataProperty(v8::Local<v8::Context> context,
     return Just(false);
   }
 
-  has_pending_exception = i::Runtime::DefineObjectProperty(
-                              self, isolate->factory()->Uint32ToString(index),
-                              value_obj, NONE).is_null();
+  has_pending_exception = i::JSObject::SetOwnElementIgnoreAttributes(
+                              self, index, value_obj, NONE).is_null();
   RETURN_ON_FAILED_EXECUTION_PRIMITIVE(bool);
   return Just(true);
 }
@@ -3613,6 +3612,34 @@ Maybe<bool> v8::Object::DefineOwnProperty(v8::Local<v8::Context> context,
 }
 
 
+MUST_USE_RESULT
+static i::MaybeHandle<i::Object> DefineObjectProperty(
+    i::Handle<i::JSObject> js_object, i::Handle<i::Object> key,
+    i::Handle<i::Object> value, PropertyAttributes attrs) {
+  i::Isolate* isolate = js_object->GetIsolate();
+  // Check if the given key is an array index.
+  uint32_t index = 0;
+  if (key->ToArrayIndex(&index)) {
+    return i::JSObject::SetOwnElementIgnoreAttributes(js_object, index, value,
+                                                      attrs);
+  }
+
+  i::Handle<i::Name> name;
+  if (key->IsName()) {
+    name = i::Handle<i::Name>::cast(key);
+  } else {
+    // Call-back into JavaScript to convert the key to a string.
+    i::Handle<i::Object> converted;
+    ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, converted,
+                                     i::Execution::ToString(isolate, key),
+                                     i::MaybeHandle<i::Object>());
+    name = i::Handle<i::String>::cast(converted);
+  }
+
+  return i::JSObject::DefinePropertyOrElement(js_object, name, value, attrs);
+}
+
+
 Maybe<bool> v8::Object::ForceSet(v8::Local<v8::Context> context,
                                  v8::Local<Value> key, v8::Local<Value> value,
                                  v8::PropertyAttribute attribs) {
@@ -3620,11 +3647,9 @@ Maybe<bool> v8::Object::ForceSet(v8::Local<v8::Context> context,
   auto self = Utils::OpenHandle(this);
   auto key_obj = Utils::OpenHandle(*key);
   auto value_obj = Utils::OpenHandle(*value);
-  has_pending_exception = i::Runtime::DefineObjectProperty(
-      self,
-      key_obj,
-      value_obj,
-      static_cast<PropertyAttributes>(attribs)).is_null();
+  has_pending_exception =
+      DefineObjectProperty(self, key_obj, value_obj,
+                           static_cast<PropertyAttributes>(attribs)).is_null();
   RETURN_ON_FAILED_EXECUTION_PRIMITIVE(bool);
   return Just(true);
 }
@@ -3640,9 +3665,8 @@ bool v8::Object::ForceSet(v8::Handle<Value> key, v8::Handle<Value> value,
   i::Handle<i::Object> key_obj = Utils::OpenHandle(*key);
   i::Handle<i::Object> value_obj = Utils::OpenHandle(*value);
   has_pending_exception =
-      i::Runtime::DefineObjectProperty(self, key_obj, value_obj,
-                                       static_cast<PropertyAttributes>(attribs))
-          .is_null();
+      DefineObjectProperty(self, key_obj, value_obj,
+                           static_cast<PropertyAttributes>(attribs)).is_null();
   EXCEPTION_BAILOUT_CHECK_SCOPED(isolate, false);
   return true;
 }