No longer store the compilation-context in WorkItem.

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 9f319db39dd63efc7256a09f95a587b3ce71a652..5bfae8b0f77d798fb9f98ac2a003c3101ab80119 100644
--- a/pkg/compiler/lib/src/serialization/task.dart
+++ b/pkg/compiler/lib/src/serialization/task.dart
@@ -8,7 +8,6 @@ import 'dart:async' show EventSink, Future;
 
 import '../common/resolution.dart' show ResolutionImpact, ResolutionWorkItem;
 import '../common/tasks.dart' show CompilerTask;
-import '../common/work.dart' show ItemCompilationContext;
 import '../compiler.dart' show Compiler;
 import '../elements/elements.dart';
 import '../enqueue.dart' show ResolutionEnqueuer;
@@ -71,12 +70,11 @@ class SerializationTask extends CompilerTask implements LibraryDeserializer {
   }
 
   /// Creates the [ResolutionWorkItem] for the deserialized [element].
-  ResolutionWorkItem createResolutionWorkItem(
-      Element element, ItemCompilationContext context) {
+  ResolutionWorkItem createResolutionWorkItem(Element element) {
     assert(deserializer != null);
     assert(isDeserialized(element));
     return new DeserializedResolutionWorkItem(
-        element, context, deserializer.computeWorldImpact(element));
+        element, deserializer.computeWorldImpact(element));
   }
 
   bool hasResolvedAst(ExecutableElement element) {
@@ -139,12 +137,10 @@ class SerializationTask extends CompilerTask implements LibraryDeserializer {
 /// This will not resolve the element but only compute the [WorldImpact].
 class DeserializedResolutionWorkItem implements ResolutionWorkItem {
   final Element element;
-  final ItemCompilationContext compilationContext;
   final WorldImpact worldImpact;
   bool _isAnalyzed = false;
 
-  DeserializedResolutionWorkItem(
-      this.element, this.compilationContext, this.worldImpact);
+  DeserializedResolutionWorkItem(this.element, this.worldImpact);
 
   @override
   bool get isAnalyzed => _isAnalyzed;