Decouple WorkItem from Compiler

pkg/compiler/lib/src/serialization/task.dart

Index: pkg/compiler/lib/src/serialization/task.dart
diff --git a/pkg/compiler/lib/src/serialization/task.dart b/pkg/compiler/lib/src/serialization/task.dart
index 5bfae8b0f77d798fb9f98ac2a003c3101ab80119..acad2240e73628ce645ffc3030d5049ddc78756b 100644
--- a/pkg/compiler/lib/src/serialization/task.dart
+++ b/pkg/compiler/lib/src/serialization/task.dart
@@ -138,17 +138,11 @@ class SerializationTask extends CompilerTask implements LibraryDeserializer {
 class DeserializedResolutionWorkItem implements ResolutionWorkItem {
   final Element element;
   final WorldImpact worldImpact;
-  bool _isAnalyzed = false;
 
   DeserializedResolutionWorkItem(this.element, this.worldImpact);
 
   @override
-  bool get isAnalyzed => _isAnalyzed;
-
-  @override
-  WorldImpact run(Compiler compiler, ResolutionEnqueuer world) {
-    _isAnalyzed = true;
-    world.registerProcessedElement(element);
+  WorldImpact run() {
     return worldImpact;
   }
 }