All strong mode cleaning of dart2js.

pkg/compiler/lib/src/js_emitter/full_emitter/emitter.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.js_emitter.full_emitter;
 
 import 'dart:collection' show HashMap;
 import 'dart:convert';
 
 import 'package:js_runtime/shared/embedded_names.dart' as embeddedNames;
 import 'package:js_runtime/shared/embedded_names.dart'
     show JsBuiltin, JsGetName;
 
 import '../../../compiler_new.dart';
 import '../../common.dart';
 import '../../compiler.dart' show Compiler;
 import '../../constants/values.dart';
 import '../../common_elements.dart' show CommonElements, ElementEnvironment;
 import '../../elements/resolution_types.dart' show ResolutionDartType;
 import '../../deferred_load.dart' show OutputUnit;
 import '../../elements/elements.dart'
-    show
-        ClassElement,
-        ConstructorBodyElement,
-        FieldElement,
-        LibraryElement,
-        TypedefElement;
+    show ConstructorBodyElement, FieldElement, LibraryElement, TypedefElement;
 import '../../elements/entities.dart';
 import '../../elements/entity_utils.dart' as utils;
 import '../../elements/names.dart';
 import '../../hash/sha1.dart' show Hasher;
 import '../../io/code_output.dart';
 import '../../io/location_provider.dart' show LocationCollector;
 import '../../io/source_map_builder.dart' show SourceMapBuilder;
 import '../../js/js.dart' as jsAst;
 import '../../js/js.dart' show js;
 import '../../js_backend/js_backend.dart'
@@ skipping 275 matching lines @@
   @override
   jsAst.Expression isolateStaticClosureAccess(FunctionEntity element) {
     return jsAst.js('#.#()', [
       namer.globalObjectForMember(element),
       namer.staticClosureName(element)
     ]);
   }
 
   @override
   jsAst.PropertyAccess prototypeAccess(
-      ClassElement element, bool hasBeenInstantiated) {
+      ClassEntity element, bool hasBeenInstantiated) {
     return jsAst.js('#.prototype', constructorAccess(element));
   }
 
   @override
   jsAst.Template templateForBuiltin(JsBuiltin builtin) {
     switch (builtin) {
       case JsBuiltin.dartObjectConstructor:
         return jsAst.js
             .expressionTemplateYielding(typeAccess(commonElements.objectClass));
 
@@ skipping 1638 matching lines @@
     // data.
     mapping["_comment"] = "This mapping shows which compiled `.js` files are "
         "needed for a given deferred library import.";
     mapping.addAll(compiler.deferredLoadTask.computeDeferredMap());
     compiler.outputProvider(
         compiler.options.deferredMapUri.path, '', OutputType.info)
       ..add(const JsonEncoder.withIndent("  ").convert(mapping))
       ..close();
   }
 }