Change Enqueuer to use Entity instead of Element.

pkg/compiler/lib/src/closure.dart

Index: pkg/compiler/lib/src/closure.dart
diff --git a/pkg/compiler/lib/src/closure.dart b/pkg/compiler/lib/src/closure.dart
index f9885ba2a4e424bee9f0db99a090f847f7747c67..42ecd67ac447ddc65b5d2117c178ccdb44a5a43a 100644
--- a/pkg/compiler/lib/src/closure.dart
+++ b/pkg/compiler/lib/src/closure.dart
@@ -50,7 +50,7 @@ class ClosureTask extends CompilerTask {
 
   /// Create [ClosureClassMap]s for all live members.
   void createClosureClasses() {
-    compiler.enqueuer.resolution.processedElements
+    compiler.enqueuer.resolution.processedEntities
         .forEach((AstElement element) {
       ResolvedAst resolvedAst = element.resolvedAst;
       if (element.isAbstract) return;
@@ -121,7 +121,7 @@ class ClosureTask extends CompilerTask {
       throw new SpannableAssertionFailure(
           closure, 'Not a closure: $closure (${closure.runtimeType}).');
     }
-    compiler.enqueuer.codegen.forgetElement(cls, compiler);
+    compiler.enqueuer.codegen.forgetEntity(cls, compiler);
   }
 }