Address review comments of https://codereview.chromium.org/11299020/

runtime/vm/flow_graph_compiler_x64.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/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 140 matching lines @@
       type_arguments.IsRaw(type_arguments.Length());
   if (is_raw_type) {
     const Register kClassIdReg = R10;
     // dynamic type argument, check only classes.
     // List is a very common case.
     __ LoadClassId(kClassIdReg, kInstanceReg);
     if (!type_class.is_interface()) {
       __ cmpl(kClassIdReg, Immediate(type_class.id()));
       __ j(EQUAL, is_instance_lbl);
     }
-    if (type_class.raw() == Isolate::Current()->object_store()->list_class()) {
+    if (type_class.IsListClass()) {
       GenerateListTypeCheck(kClassIdReg, is_instance_lbl);
     }
     return GenerateSubtype1TestCacheLookup(
         token_pos, type_class, is_instance_lbl, is_not_instance_lbl);
   }
   // If one type argument only, check if type argument is Object or dynamic.
   if (type_arguments.Length() == 1) {
     const AbstractType& tp_argument = AbstractType::ZoneHandle(
         type_arguments.TypeAt(0));
     ASSERT(!tp_argument.IsMalformed());
@@ skipping 1191 matching lines @@
 void ParallelMoveResolver::Exchange(const Address& mem1, const Address& mem2) {
   __ Exchange(mem1, mem2);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64