Store and serialize NativeBehavior in TreeElements.

pkg/compiler/lib/src/universe/side_effects.dart

 // Copyright (c) 2013, 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.
 
 library universe.side_effects;
 
 class SideEffects {
   // Changes flags.
   static const int FLAG_CHANGES_INDEX = 0;
   static const int FLAG_CHANGES_INSTANCE_PROPERTY = FLAG_CHANGES_INDEX + 1;
@@ skipping 15 matching lines @@
   SideEffects() {
     setAllSideEffects();
     setDependsOnSomething();
   }
 
   SideEffects.empty() {
     clearAllDependencies();
     clearAllSideEffects();
   }
 
+  SideEffects.fromFlags(this._flags);
+
   bool operator ==(other) => _flags == other._flags;
 
   int get hashCode => throw new UnsupportedError('SideEffects.hashCode');
 
   bool _getFlag(int position) => (_flags & (1 << position)) != 0;
   void _setFlag(int position) {
     _flags |= (1 << position);
   }
 
   void _clearFlag(int position) {
@@ skipping 94 matching lines @@
   bool dependsOn(int dependsFlags) => (_flags & dependsFlags) != 0;
 
   void add(SideEffects other) {
     _flags |= other._flags;
   }
 
   void setTo(SideEffects other) {
     _flags = other._flags;
   }
 
+  int get flags => _flags;
+
   String toString() {
     StringBuffer buffer = new StringBuffer();
     buffer.write('Depends on');
     if (dependsOnIndexStore()) buffer.write(' []');
     if (dependsOnInstancePropertyStore()) buffer.write(' field store');
     if (dependsOnStaticPropertyStore()) buffer.write(' static store');
     if (!dependsOnSomething()) buffer.write(' nothing');
     buffer.write(', Changes');
     if (changesIndex()) buffer.write(' []');
     if (changesInstanceProperty()) buffer.write(' field');
     if (changesStaticProperty()) buffer.write(' static');
     if (!hasSideEffects()) buffer.write(' nothing');
     buffer.write('.');
     return buffer.toString();
   }
 }