Ensure slow properties for simple {__proto__:null} literals.

src/ast/ast.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/ast/ast.h"
 
 #include <cmath>  // For isfinite.
 
 #include "src/ast/compile-time-value.h"
 #include "src/ast/prettyprinter.h"
@@ skipping 472 matching lines @@
     entry->value = property;
   }
 }
 
 
 bool ObjectLiteral::IsBoilerplateProperty(ObjectLiteral::Property* property) {
   return property != NULL &&
          property->kind() != ObjectLiteral::Property::PROTOTYPE;
 }
 
-
 void ObjectLiteral::BuildConstantProperties(Isolate* isolate) {
   if (!constant_properties_.is_null()) return;
 
   // Allocate a fixed array to hold all the constant properties.
   Handle<FixedArray> constant_properties = isolate->factory()->NewFixedArray(
       boilerplate_properties_ * 2, TENURED);
 
   int position = 0;
   // Accumulate the value in local variables and store it at the end.
   bool is_simple = true;
@@ skipping 439 matching lines @@
 // static
 bool Literal::Match(void* literal1, void* literal2) {
   const AstValue* x = static_cast<Literal*>(literal1)->raw_value();
   const AstValue* y = static_cast<Literal*>(literal2)->raw_value();
   return (x->IsString() && y->IsString() && x->AsString() == y->AsString()) ||
          (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber());
 }
 
 }  // namespace internal
 }  // namespace v8