Implement JsClassMirror.constructors.

dart/sdk/lib/mirrors/mirrors.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.
 
 // For the purposes of the mirrors library, we adopt a naming
 // convention with respect to getters and setters.  Specifically, for
 // some variable or field...
 //
 //   var myField;
 //
@@ skipping 647 matching lines @@
   /**
    * An immutable map from names to mirrors for all variable
    * declarations for this type.
    */
   Map<Symbol, VariableMirror> get variables;
 
   /**
    * An immutable map from names to mirrors for all constructor
    * declarations for this type.
    */
-   Map<Symbol, MethodMirror> get constructors;
+  Map<Symbol, MethodMirror> get constructors;
 
   /**
    * An immutable map from names to mirrors for all type variables for
    * this type.
    *
    * This map preserves the order of declaration of the type variables.
    */
-   Map<Symbol, TypeVariableMirror> get typeVariables;
+  Map<Symbol, TypeVariableMirror> get typeVariables;
 
   /**
    * An immutable map from names to mirrors for all type arguments for
    * this type.
    *
    * This map preserves the order of declaration of the type variables.
    */
   Map<Symbol, TypeMirror> get typeArguments;
 
   /**
@@ skipping 501 matching lines @@
    *
    * When used as metadata on an import of "dart:mirrors", this metadata does
    * not apply to the library in which the annotation is used, but instead
    * applies to the other libraries (all libraries if "*" is used).
    */
   final override;
 
   const MirrorsUsed(
       {this.symbols, this.targets, this.metaTargets, this.override});
 }