Prefix resolution_types with Resolution.

pkg/compiler/lib/src/enqueue.dart

Index: pkg/compiler/lib/src/enqueue.dart
diff --git a/pkg/compiler/lib/src/enqueue.dart b/pkg/compiler/lib/src/enqueue.dart
index 62734f16d46c2a159aee79f4437a5f3dad74a462..8b893361e4c4c847ecf4d184a908a9af2108fa21 100644
--- a/pkg/compiler/lib/src/enqueue.dart
+++ b/pkg/compiler/lib/src/enqueue.dart
@@ -14,7 +14,8 @@ import 'common/work.dart' show WorkItem;
 import 'common.dart';
 import 'compiler.dart' show Compiler, GlobalDependencyRegistry;
 import 'options.dart';
-import 'elements/resolution_types.dart' show DartType, InterfaceType;
+import 'elements/resolution_types.dart'
+    show ResolutionDartType, ResolutionInterfaceType;
 import 'elements/elements.dart'
     show
         AnalyzableElement,
@@ -183,7 +184,7 @@ class ResolutionEnqueuer extends EnqueuerImpl {
         impactSource, worldImpact, _impactVisitor, impactUse);
   }
 
-  void _registerInstantiatedType(InterfaceType type,
+  void _registerInstantiatedType(ResolutionInterfaceType type,
       {ConstructorElement constructor,
       bool mirrorUsage: false,
       bool nativeUsage: false,
@@ -274,7 +275,7 @@ class ResolutionEnqueuer extends EnqueuerImpl {
   }
 
   void processTypeUse(TypeUse typeUse) {
-    DartType type = typeUse.type;
+    ResolutionDartType type = typeUse.type;
     switch (typeUse.kind) {
       case TypeUseKind.INSTANTIATION:
         _registerInstantiatedType(type, globalDependency: false);
@@ -305,7 +306,7 @@ class ResolutionEnqueuer extends EnqueuerImpl {
     }
   }
 
-  void _registerIsCheck(DartType type) {
+  void _registerIsCheck(ResolutionDartType type) {
     type = _universe.registerIsCheck(type);
     // Even in checked mode, type annotations for return type and argument
     // types do not imply type checks, so there should never be a check