Add NativeDataResolver

pkg/compiler/lib/src/ssa/optimize.dart

 // 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.
 
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/names.dart' show Selectors;
 import '../common/tasks.dart' show CompilerTask;
 import '../compiler.dart' show Compiler;
 import '../constants/constant_system.dart';
 import '../constants/values.dart';
@@ skipping 2534 matching lines @@
     nonEscapingReceivers.add(instruction);
   }
 
   /**
    * Sets `receiver.element` to contain [value]. Kills all potential places that
    * may be affected by this update.
    */
   void registerFieldValueUpdate(
       MemberEntity element, HInstruction receiver, HInstruction value) {
     assert(receiver == null || receiver == receiver.nonCheck());
-    if (closedWorld.backendClasses.isNativeMember(element)) {
+    if (closedWorld.nativeData.isNativeMember(element)) {
       return; // TODO(14955): Remove this restriction?
     }
     // [value] is being set in some place in memory, we remove it from
     // the non-escaping set.
     nonEscapingReceivers.remove(value.nonCheck());
     Map<HInstruction, HInstruction> map =
         fieldValues.putIfAbsent(element, () => <HInstruction, HInstruction>{});
     map.forEach((key, value) {
       if (mayAlias(receiver, key)) map[key] = null;
     });
     map[receiver] = value;
   }
 
   /**
    * Registers that `receiver.element` is now [value].
    */
   void registerFieldValue(
       MemberEntity element, HInstruction receiver, HInstruction value) {
     assert(receiver == null || receiver == receiver.nonCheck());
-    if (closedWorld.backendClasses.isNativeMember(element)) {
+    if (closedWorld.nativeData.isNativeMember(element)) {
       return; // TODO(14955): Remove this restriction?
     }
     Map<HInstruction, HInstruction> map =
         fieldValues.putIfAbsent(element, () => <HInstruction, HInstruction>{});
     map[receiver] = value;
   }
 
   /**
    * Returns the value stored in `receiver.element`. Returns `null` if we don't
    * know.
@@ skipping 195 matching lines @@
 
     keyedValues.forEach((receiver, values) {
       result.keyedValues[receiver] =
           new Map<HInstruction, HInstruction>.from(values);
     });
 
     result.nonEscapingReceivers.addAll(nonEscapingReceivers);
     return result;
   }
 }