Compute and cache element NativeBehavior during resolution.

pkg/compiler/lib/src/common/resolution.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.
 
 library dart2js.common.resolution;
 
 import '../common.dart';
 import '../compiler.dart' show Compiler;
 import '../constants/expressions.dart' show ConstantExpression;
 import '../core_types.dart' show CoreClasses, CoreTypes;
@@ skipping 184 matching lines @@
   /// Returns the [ResolutionImpact] for [element].
   ResolutionImpact getResolutionImpact(Element element);
 }
 
 /// Interface defining target-specific behavior for resolution.
 abstract class Target {
   /// Returns `true` if [library] is a target specific library whose members
   /// have special treatment, such as being allowed to extends blacklisted
   /// classes or members being eagerly resolved.
   bool isTargetSpecificLibrary(LibraryElement element);
+
+  /// Resolve target specific information for [element] and register it with
+  /// [registry].
+  void resolveNativeElement(Element element, NativeRegistry registry) {}
 }
 
 // TODO(johnniwinther): Rename to `Resolver` or `ResolverContext`.
 abstract class Resolution implements Frontend {
   ParsingContext get parsingContext;
   DiagnosticReporter get reporter;
   CoreClasses get coreClasses;
   CoreTypes get coreTypes;
   Types get types;
   Target get target;
@@ skipping 102 matching lines @@
       if (cls.isPatch) {
         patchParser.parsePatchClassNode(cls);
       }
     });
   }
 
   @override
   ScannerOptions getScannerOptionsFor(Element element) => new ScannerOptions(
       canUseNative: backend.canLibraryUseNative(element.library));
 }