Minor changes to avoid handle creation.

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 5424 matching lines @@
 
 
 void Function::set_result_type(const AbstractType& value) const {
   ASSERT(!value.IsNull());
   StorePointer(&raw_ptr()->result_type_, value.raw());
 }
 
 
 RawAbstractType* Function::ParameterTypeAt(intptr_t index) const {
   const Array& parameter_types = Array::Handle(raw_ptr()->parameter_types_);
-  AbstractType& parameter_type = AbstractType::Handle();
-  parameter_type ^= parameter_types.At(index);
-  return parameter_type.raw();
+  return AbstractType::RawCast(parameter_types.At(index));
 }
 
 
 void Function::SetParameterTypeAt(
     intptr_t index, const AbstractType& value) const {
   ASSERT(!value.IsNull());
   const Array& parameter_types = Array::Handle(raw_ptr()->parameter_types_);
   parameter_types.SetAt(index, value);
 }
 
 
 void Function::set_parameter_types(const Array& value) const {
   StorePointer(&raw_ptr()->parameter_types_, value.raw());
 }
 
 
 RawString* Function::ParameterNameAt(intptr_t index) const {
   const Array& parameter_names = Array::Handle(raw_ptr()->parameter_names_);
-  String& parameter_name = String::Handle();
-  parameter_name ^= parameter_names.At(index);
-  return parameter_name.raw();
+  return String::RawCast(parameter_names.At(index));
 }
 
 
 void Function::SetParameterNameAt(intptr_t index, const String& value) const {
   ASSERT(!value.IsNull() && value.IsSymbol());
   const Array& parameter_names = Array::Handle(raw_ptr()->parameter_names_);
   parameter_names.SetAt(index, value);
 }
 
 
@@ skipping 14141 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart