Use closure tracer to identify closures that are not passed to Function.apply

sdk/lib/_internal/compiler/implementation/elements/elements.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.
 
 library elements;
 
 
 import '../tree/tree.dart';
 import '../util/util.dart';
 import '../resolution/resolution.dart';
@@ skipping 812 matching lines @@
   FunctionExpression get node;
   DartType get type;
   FunctionSignature get functionSignature;
   FunctionElement get redirectionTarget;
   FunctionElement get defaultImplementation;
 
   FunctionElement get patch;
   FunctionElement get origin;
 
   bool get isRedirectingFactory;
+  void set mightBePassedToFunctionApply(bool value);

[karlklose, 2014/04/03 08:37:28]

Please add these to the world: it is a global property of the program and not a
property of the function itself.

[ngeoffray, 2014/04/03 08:49:36]

Also, as a general principle, you should not touch the element model for backend
purposes. We failed some time at being consistent, but ideally the element model
is something we wanted to be immutable after the resolution phase.

[herhut, 2014/04/14 08:21:47]

Done.

[herhut, 2014/04/14 08:21:47]

Done.

+  bool get mightBePassedToFunctionApply;
 
   /**
    * Compute the type of the target of a constructor for an instantiation site
    * with type [:newType:].
    */
   InterfaceType computeTargetType(InterfaceType newType);
 
   // TODO(kasperl): These are bit fishy. Do we really need them?
   void set patch(FunctionElement value);
   void set origin(FunctionElement value);
@@ skipping 283 matching lines @@
   InterfaceType get declarer;
 
   /// Returns `true` if this member is static.
   bool get isStatic;
 
   /// Returns `true` if this member is a getter or setter implicitly declared
   /// by a field.
   bool get isDeclaredByField;
 }