[builtins] Introduce DeleteProperty builtin

src/compiler/js-generic-lowering.cc

 // Copyright 2014 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/compiler/js-generic-lowering.h"
 
 #include "src/ast/ast.h"
 #include "src/builtins/builtins-constructor.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 291 matching lines @@
 
 void JSGenericLowering::LowerJSStoreDataPropertyInLiteral(Node* node) {
   FeedbackParameter const& p = FeedbackParameterOf(node->op());
   node->InsertInputs(zone(), 4, 2);
   node->ReplaceInput(4, jsgraph()->HeapConstant(p.feedback().vector()));
   node->ReplaceInput(5, jsgraph()->SmiConstant(p.feedback().index()));
   ReplaceWithRuntimeCall(node, Runtime::kDefineDataPropertyInLiteral);
 }
 
 void JSGenericLowering::LowerJSDeleteProperty(Node* node) {
-  LanguageMode language_mode = OpParameter<LanguageMode>(node);
-  ReplaceWithRuntimeCall(node, is_strict(language_mode)
-                                   ? Runtime::kDeleteProperty_Strict
-                                   : Runtime::kDeleteProperty_Sloppy);
+  CallDescriptor::Flags flags = FrameStateFlagForCall(node);
+  Callable callable = CodeFactory::DeleteProperty(isolate());
+  ReplaceWithStubCall(node, callable, flags);
 }
 
 void JSGenericLowering::LowerJSGetSuperConstructor(Node* node) {
   CallDescriptor::Flags flags = FrameStateFlagForCall(node);
   Callable callable = CodeFactory::GetSuperConstructor(isolate());
   ReplaceWithStubCall(node, callable, flags);
 }
 
 void JSGenericLowering::LowerJSInstanceOf(Node* node) {
   CallDescriptor::Flags flags = FrameStateFlagForCall(node);
@@ skipping 396 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSGenericLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8