WIP: Compute constant expressions in resolution.

pkg/compiler/lib/src/js_backend/constant_handler_javascript.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.
 
 part of js_backend;
 
 /// [ConstantCompilerTask] for compilation of constants for the JavaScript
 /// backend.
 ///
 /// Since this task needs to distinguish between frontend and backend constants
@@ skipping 34 matching lines @@
   ConstantExpression compileConstant(VariableElement element) {
     return measure(() {
       // TODO(het): Only report errors from one of the constant compilers
       ConstantExpression result = dartConstantCompiler.compileConstant(element);
       jsConstantCompiler.compileConstant(element);
       return result;
     });
   }
 
   @override
-  void evaluate(ConstantExpression constant) {
+  void evaluate(Spannable spannable, ConstantExpression constant) {
     return measure(() {
-      dartConstantCompiler.evaluate(constant);
-      jsConstantCompiler.evaluate(constant);
+      dartConstantCompiler.evaluate(spannable, constant);
+      jsConstantCompiler.evaluate(spannable, constant);
     });
   }
 
   void compileVariable(VariableElement element) {
     measure(() {
       jsConstantCompiler.compileVariable(element);
     });
   }
 
   ConstantExpression compileNode(Node node, TreeElements elements,
@@ skipping 221 matching lines @@
     // TODO(ahe): This doesn't belong here. Rename this class and generalize.
     var closureClassMap =
         constants.compiler.closureToClassMapper.closureMappingCache
         .remove(node);
     if (closureClassMap != null) {
       closureClassMap.removeMyselfFrom(
           constants.compiler.enqueuer.codegen.universe);
     }
   }
 }