Split resolution into several libraries.

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

Index: pkg/compiler/lib/src/resolution/variables.dart
diff --git a/pkg/compiler/lib/src/resolution/variables.dart b/pkg/compiler/lib/src/resolution/variables.dart
index a738b4f145ff35a2c6f9a923b57dd32e6afdd407..04bb1780e49e13784f0efed68d1f6e470038058c 100644
--- a/pkg/compiler/lib/src/resolution/variables.dart
+++ b/pkg/compiler/lib/src/resolution/variables.dart
@@ -2,7 +2,27 @@
 // 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.
 
-part of resolution;
+library dart2js.resolution.variables;
+
+import '../compiler.dart' show
+    Compiler;
+import '../diagnostics/messages.dart' show
+    MessageKind;
+import '../elements/modelx.dart' show
+    LocalVariableElementX,
+    VariableList;
+import '../tree/tree.dart';
+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;