[proxies] Implement [[Set]].

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 1814 matching lines @@
                                                 Handle<Object> attributes);
   MUST_USE_RESULT static Object* DefineProperties(Isolate* isolate,
                                                   Handle<Object> object,
                                                   Handle<Object> properties);
 
   // "virtual" dispatcher to the correct [[DefineOwnProperty]] implementation.
   static bool DefineOwnProperty(Isolate* isolate, Handle<JSReceiver> object,
                                 Handle<Object> key, PropertyDescriptor* desc,
                                 ShouldThrow should_throw);
 
-  // "virtual" dispatcher to the correct [[CreateDataProperty]] implementation.
-  MUST_USE_RESULT static Maybe<bool> CreateDataProperty(LookupIterator* it,
-                                                        Handle<Object> value);
+  // ES6 7.3.4 (when passed DONT_THROW)
+  MUST_USE_RESULT static Maybe<bool> CreateDataProperty(
+      LookupIterator* it, Handle<Object> value, ShouldThrow should_throw);
 
   // ES6 9.1.6.1
   static bool OrdinaryDefineOwnProperty(Isolate* isolate,
                                         Handle<JSObject> object,
                                         Handle<Object> key,
                                         PropertyDescriptor* desc,
                                         ShouldThrow should_throw);
   static bool OrdinaryDefineOwnProperty(LookupIterator* it,
                                         PropertyDescriptor* desc,
                                         ShouldThrow should_throw);
@@ skipping 7684 matching lines @@
   static bool OwnPropertyKeys(Isolate* isolate, Handle<JSReceiver> receiver,
                               Handle<JSProxy> proxy, KeyFilter filter,
                               Enumerability enum_policy,
                               KeyAccumulator* accumulator);
 
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithHandler(
       Handle<JSProxy> proxy,
       Handle<Object> receiver,
       Handle<Name> name);
 
-  // If the handler defines an accessor property with a setter, invoke it.
-  // If it defines an accessor property without a setter, or a data property
-  // that is read-only, fail.  In all these cases set '*done' to true.
-  // Otherwise set it to false, in which case the return value is not
-  // meaningful.
-  MUST_USE_RESULT
-  static Maybe<bool> SetPropertyViaPrototypesWithHandler(
-      Handle<JSProxy> proxy, Handle<Object> receiver, Handle<Name> name,
-      Handle<Object> value, ShouldThrow should_throw, bool* done);
-
   MUST_USE_RESULT static Maybe<PropertyAttributes> GetPropertyAttributes(
       LookupIterator* it);
 
-  MUST_USE_RESULT static Maybe<bool> SetPropertyWithHandler(
-      Handle<JSProxy> proxy, Handle<Object> receiver, Handle<Name> name,
-      Handle<Object> value, ShouldThrow should_throw);
+  MUST_USE_RESULT static Maybe<bool> SetProperty(Handle<JSProxy> proxy,
+                                                 Handle<Name> name,
+                                                 Handle<Object> value,
+                                                 Handle<Object> receiver,
+                                                 LanguageMode language_mode);
 
   // Dispatched behavior.
   DECLARE_PRINTER(JSProxy)
   DECLARE_VERIFIER(JSProxy)
 
   // Layout description. We add padding so that a proxy has the same
   // size as a virgin JSObject. This is essential for becoming a JSObject
   // upon freeze.
   static const int kTargetOffset = HeapObject::kHeaderSize;
   static const int kHandlerOffset = kTargetOffset + kPointerSize;
@@ skipping 1143 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_