remove dependency on compiler from resolution

pkg/compiler/lib/src/resolution/variables.dart

 // Copyright (c) 2015, 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.resolution.variables;
 
 import '../common.dart';
-import '../compiler.dart' show Compiler;
+import '../common/resolution.dart';
 import '../elements/modelx.dart' show LocalVariableElementX, VariableList;
 import '../tree/tree.dart';
 import '../universe/use.dart' show TypeUse;
 import '../util/util.dart' show Link;
 
 import 'members.dart' show ResolverVisitor;
 import 'registry.dart' show ResolutionRegistry;
 import 'resolution_common.dart' show CommonResolverVisitor;
 import 'scope.dart' show VariableDefinitionScope;
 
 class VariableDefinitionsVisitor extends CommonResolverVisitor<Identifier> {
   VariableDefinitions definitions;
   ResolverVisitor resolver;
   VariableList variables;
 
   VariableDefinitionsVisitor(
-      Compiler compiler, this.definitions, this.resolver, this.variables)
-      : super(compiler) {}
+      Resolution resolution, this.definitions, this.resolver, this.variables)
+      : super(resolution);
 
   ResolutionRegistry get registry => resolver.registry;
 
   Identifier visitSendSet(SendSet node) {
     assert(node.arguments.tail.isEmpty); // Sanity check
     Identifier identifier = node.selector;
     String name = identifier.source;
     VariableDefinitionScope scope =
         new VariableDefinitionScope(resolver.scope, name);
     resolver.visitIn(node.arguments.head, scope);
     if (scope.variableReferencedInInitializer) {
       reporter.reportErrorMessage(identifier,
           MessageKind.REFERENCE_IN_INITIALIZATION, {'variableName': name});
     }
     return identifier;
   }
 
   Identifier visitIdentifier(Identifier node) {
     // The variable is initialized to null.
     // TODO(johnniwinther): Register a feature instead.
     registry.registerTypeUse(
-        new TypeUse.instantiation(compiler.coreTypes.nullType));
+        new TypeUse.instantiation(resolution.coreTypes.nullType));
     if (definitions.modifiers.isConst) {
       if (resolver.inLoopVariable) {
         reporter.reportErrorMessage(node, MessageKind.CONST_LOOP_VARIABLE);
       } else {
         reporter.reportErrorMessage(
             node, MessageKind.CONST_WITHOUT_INITIALIZER);
       }
     }
     if (definitions.modifiers.isFinal && !resolver.inLoopVariable) {
       reporter.reportErrorMessage(node, MessageKind.FINAL_WITHOUT_INITIALIZER);
     }
     return node;
   }
 
   visitNodeList(NodeList node) {
     for (Link<Node> link = node.nodes; !link.isEmpty; link = link.tail) {
       Identifier name = visit(link.head);
       LocalVariableElementX element = new LocalVariableElementX(
           name.source, resolver.enclosingElement, variables, name.token);
       resolver.defineLocalVariable(link.head, element);
       resolver.addToScope(element);
       if (definitions.modifiers.isConst) {
-        compiler.enqueuer.resolution.addDeferredAction(element, () {
+        addDeferredAction(element, () {
           element.constant =
-              compiler.resolver.constantCompiler.compileConstant(element);
+              resolution.resolver.constantCompiler.compileConstant(element);
         });
       }
     }
   }
 }