[Interpreter] Use FastCloneShallowObjectStub in CreateObjectLiteral bytecode.

src/full-codegen/full-codegen.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/full-codegen/full-codegen.h"
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/ast.h"
 #include "src/ast/prettyprinter.h"
 #include "src/ast/scopeinfo.h"
@@ skipping 126 matching lines @@
 int FullCodeGenerator::NewHandlerTableEntry() {
   int index = static_cast<int>(handler_table_.size());
   HandlerTableEntry entry = {0, 0, 0, 0, 0};
   handler_table_.push_back(entry);
   return index;
 }
 
 
 bool FullCodeGenerator::MustCreateObjectLiteralWithRuntime(
     ObjectLiteral* expr) const {
-  // FastCloneShallowObjectStub doesn't copy elements, and object literals don't
-  // support copy-on-write (COW) elements for now.
-  // TODO(mvstanton): make object literals support COW elements.
-  return masm()->serializer_enabled() || !expr->fast_elements() ||
-         !expr->has_shallow_properties() ||
-         expr->properties_count() >
-             FastCloneShallowObjectStub::kMaximumClonedProperties;
+  return masm()->serializer_enabled() ||
+         !FastCloneShallowObjectStub::IsSupported(expr);
 }
 
 
 bool FullCodeGenerator::MustCreateArrayLiteralWithRuntime(
     ArrayLiteral* expr) const {
   return expr->depth() > 1 ||
          expr->values()->length() > JSArray::kInitialMaxFastElementArray;
 }
 
 
@@ skipping 1772 matching lines @@
   return var->scope()->is_nonlinear() ||
          var->initializer_position() >= proxy->position();
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8