Further reduce use of Element in codegen.

pkg/compiler/lib/src/js_emitter/code_emitter_task.dart

 // Copyright (c) 2012, 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.
 
 part of dart2js.js_emitter;
 
 const USE_LAZY_EMITTER = const bool.fromEnvironment("dart2js.use.lazy.emitter");
 
 /**
  * Generates the code for all used classes in the program. Static fields (even
@@ skipping 104 matching lines @@
   }
 
   /// Returns the JS constructor of the given interceptor class [e].
   jsAst.Expression interceptorClassAccess(ClassElement e) {
     return emitter.interceptorClassAccess(e);
   }
 
   /// Returns the JS expression representing the type [e].
   ///
   /// The given type [e] might be a Typedef.
-  jsAst.Expression typeAccess(Element e) {
+  jsAst.Expression typeAccess(Entity e) {
     return emitter.typeAccess(e);
   }
 
   /// Returns the JS template for the given [builtin].
   jsAst.Template builtinTemplateFor(JsBuiltin builtin) {
     return emitter.templateForBuiltin(builtin);
   }
 
   void registerReadTypeVariable(TypeVariableElement element) {
     readTypeVariables.add(element);
@@ skipping 71 matching lines @@
   /// The returned expression must only be used in a JS `new` expression.
   jsAst.Expression constructorAccess(ClassElement e);
 
   /// Returns the JS prototype of the given class [e].
   jsAst.Expression prototypeAccess(ClassElement e, bool hasBeenInstantiated);
 
   /// Returns the JS constructor of the given interceptor class [e].
   jsAst.Expression interceptorClassAccess(ClassElement e);
 
   /// Returns the JS expression representing the type [e].
-  jsAst.Expression typeAccess(Element e);
+  jsAst.Expression typeAccess(Entity e);
 
   /// Returns the JS expression representing a function that returns 'null'
   jsAst.Expression generateFunctionThatReturnsNull();
 
   int compareConstants(ConstantValue a, ConstantValue b);
   bool isConstantInlinedOrAlreadyEmitted(ConstantValue constant);
 
   /// Returns the JS code for accessing the given [constant].
   jsAst.Expression constantReference(ConstantValue constant);
 
   /// Returns the JS template for the given [builtin].
   jsAst.Template templateForBuiltin(JsBuiltin builtin);
 
   void invalidateCaches();
 }