Refactor Library/CompilationUnit and how we define local Scope.

lib/compiler/implementation/enqueue.dart

Index: lib/compiler/implementation/enqueue.dart
diff --git a/lib/compiler/implementation/enqueue.dart b/lib/compiler/implementation/enqueue.dart
index 41ce5f663a8d38f73ce005174ae30f4e1f226868..75e8064ac30c58a9adc555c0b521d541fa94ff02 100644
--- a/lib/compiler/implementation/enqueue.dart
+++ b/lib/compiler/implementation/enqueue.dart
@@ -137,7 +137,7 @@ class Enqueuer {
   }
 
   void processInstantiatedClass(ClassElement cls) {
-    cls.members.forEach(processInstantiatedClassMember);
+    cls.localMembers.forEach(processInstantiatedClassMember);
   }
 
   void registerFieldClosureInvocations() {
@@ -217,7 +217,7 @@ class Enqueuer {
         // TODO(ahe): Don't call resolveType, instead, call this method
         // when resolveType is called.
         compiler.resolveClass(cls);
-        cls.members.forEach(processInstantiatedClassMember);
+        cls.localMembers.forEach(processInstantiatedClassMember);
         cls = cls.superclass;
       }
     });