Order the parameters of a function at the definition site.

lib/compiler/implementation/compile_time_constants.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.
 
 /**
  * The [ConstantHandler] keeps track of compile-time constants,
  * initializations of global and static fields, and default values of
  * optional parameters.
  */
 class ConstantHandler extends CompilerTask {
@@ skipping 680 matching lines @@
 
   /**
    * Given the arguments (a list of constants) assigns them to the parameters,
    * updating the definitions map. If the constructor has field-initializer
    * parameters (like [:this.x:]), also updates the [fieldValues] map.
    */
   void assignArgumentsToParameters(List<Constant> arguments) {
     // Assign arguments to parameters.
     FunctionSignature parameters = constructor.computeSignature(compiler);
     int index = 0;
-    parameters.forEachParameter((Element parameter) {
+    parameters.orderedForEachParameter((Element parameter) {
       Constant argument = arguments[index++];
       Node node = parameter.parseNode(compiler);
       potentiallyCheckType(node, parameter, argument);
       definitions[parameter] = argument;
       if (parameter.kind == ElementKind.FIELD_PARAMETER) {
         FieldParameterElement fieldParameterElement = parameter;
         updateFieldValue(node, fieldParameterElement.fieldElement, argument);
       }
     });
   }
@@ skipping 96 matching lines @@
       Constant fieldValue = fieldValues[field];
       if (fieldValue === null) {
         // Use the default value.
         fieldValue = compiler.compileConstant(field);
       }
       jsNewArguments.add(fieldValue);
     });
     return jsNewArguments;
   }
 }