Move dart2jslib parts into separate libraries.

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

Index: pkg/compiler/lib/src/resolution/resolution.dart
diff --git a/pkg/compiler/lib/src/resolution/resolution.dart b/pkg/compiler/lib/src/resolution/resolution.dart
index d7939deb5a7f015169db80cd2dea1df81f5650ed..e7bdaa01ad4948c5cf0aa08292388197a100ee26 100644
--- a/pkg/compiler/lib/src/resolution/resolution.dart
+++ b/pkg/compiler/lib/src/resolution/resolution.dart
@@ -14,10 +14,12 @@ import '../core_types.dart';
 import '../dart_backend/dart_backend.dart' show DartBackend;
 import '../dart_types.dart';
 import '../dart2jslib.dart' hide DynamicAccess;
+import '../enqueue.dart' show
+    ResolutionEnqueuer,
+    WorldImpact;
 import '../tree/tree.dart';
 import '../scanner/scannerlib.dart';
 import '../elements/elements.dart';
-
 import '../elements/modelx.dart' show
     BaseClassElementX,
     BaseFunctionElementX,
@@ -48,14 +50,16 @@ import '../elements/modelx.dart' show
     TypedefElementX,
     VariableElementX,
     VariableList;
-
+import '../messages.dart' show MessageKind;
 import '../ordered_typeset.dart' show OrderedTypeSet, OrderedTypeSetBuilder;
 import '../types/types.dart' show TypeMask;
 import '../util/util.dart';
 import '../universe/universe.dart' show
     CallStructure,
+    Selector,
     SelectorKind,
     UniverseSelector;
+import '../world.dart' show World;
 
 import 'access_semantics.dart';
 import 'class_members.dart' show MembersCreator;