[proxies] Implement [[Set]].

src/api.cc

 // 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.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 3490 matching lines @@
                                            v8::Local<Name> key,
                                            v8::Local<Value> value) {
   PREPARE_FOR_EXECUTION_PRIMITIVE(context, "v8::Object::CreateDataProperty()",
                                   bool);
   i::Handle<i::JSReceiver> self = Utils::OpenHandle(this);
   i::Handle<i::Name> key_obj = Utils::OpenHandle(*key);
   i::Handle<i::Object> value_obj = Utils::OpenHandle(*value);
 
   i::LookupIterator it = i::LookupIterator::PropertyOrElement(
       isolate, self, key_obj, i::LookupIterator::OWN);
-  Maybe<bool> result = i::JSReceiver::CreateDataProperty(&it, value_obj);
+  Maybe<bool> result =
+      i::JSReceiver::CreateDataProperty(&it, value_obj, i::Object::DONT_THROW);
   has_pending_exception = result.IsNothing();
   RETURN_ON_FAILED_EXECUTION_PRIMITIVE(bool);
   return result;
 }
 
 
 Maybe<bool> v8::Object::CreateDataProperty(v8::Local<v8::Context> context,
                                            uint32_t index,
                                            v8::Local<Value> value) {
   PREPARE_FOR_EXECUTION_PRIMITIVE(context, "v8::Object::CreateDataProperty()",
                                   bool);
   i::Handle<i::JSReceiver> self = Utils::OpenHandle(this);
   i::Handle<i::Object> value_obj = Utils::OpenHandle(*value);
 
   i::LookupIterator it(isolate, self, index, i::LookupIterator::OWN);
-  Maybe<bool> result = i::JSReceiver::CreateDataProperty(&it, value_obj);
+  Maybe<bool> result =
+      i::JSReceiver::CreateDataProperty(&it, value_obj, i::Object::DONT_THROW);
   has_pending_exception = result.IsNothing();
   RETURN_ON_FAILED_EXECUTION_PRIMITIVE(bool);
   return result;
 }
 
 
 Maybe<bool> v8::Object::DefineOwnProperty(v8::Local<v8::Context> context,
                                           v8::Local<Name> key,
                                           v8::Local<Value> value,
                                           v8::PropertyAttribute attributes) {
@@ skipping 4987 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8