Fix warnings in dart2js code and re-enable analyzer coverage.

sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart

Index: sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart
diff --git a/sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart b/sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart
index 4e23f23fea88e4ad198a0c30dbf17fce514ec850..689811799f8354a6fe4b27e990bd627c97795174 100644
--- a/sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart
+++ b/sdk/lib/_internal/compiler/implementation/types/simple_types_inferrer.dart
@@ -10,6 +10,7 @@ import '../elements/elements.dart';
 import '../dart2jslib.dart';
 import '../tree/tree.dart';
 import '../util/util.dart' show Link;
+import '../universe/universe.dart' show Selector;
 import 'types.dart' show TypesInferrer, ConcreteType, ClassBaseType;
 
 /**
@@ -19,11 +20,11 @@ import 'types.dart' show TypesInferrer, ConcreteType, ClassBaseType;
 class WorkSet<E extends Element> {
   final List<E> queue = new List<E>();
   final Set<E> elementsInQueue = new Set<E>();
-  
+
   void add(E element) {
     element = element.implementation;
     if (elementsInQueue.contains(element)) return;
-    queue.addLast(element);
+    queue.add(element);
     elementsInQueue.add(element);
   }
 
@@ -71,7 +72,7 @@ class ClassInfoForFinalFields {
   /**
    * Records that [constructor] has been analyzed. If not at 0,
    * decrement [constructorsToVisitCount].
-   */ 
+   */
   void doneAnalyzingGenerativeConstructor(Element constructor) {
     if (constructorsToVisitCount != 0) constructorsToVisitCount--;
   }