Compute mixin application constructors in the ClassElement.constructors getter.

pkg/analyzer/test/generated/all_the_rest_test.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.all_the_rest_test;
 
 import 'package:analyzer/file_system/physical_file_system.dart';
@@ skipping 1043 matching lines @@
       ConstructorDeclaration constructorDeclaration = AstFactory
           .constructorDeclaration2(Keyword.CONST, null,
               AstFactory.identifier3(className), null,
               AstFactory.formalParameterList(), null,
               AstFactory.blockFunctionBody2());
       classDeclaration.members.add(constructorDeclaration);
       ConstructorElement constructorElement =
           ElementFactory.constructorElement(classElement, '', true);
       constructorDeclaration.element = constructorElement;
       classElement.constructors = <ConstructorElement>[constructorElement];
+    } else {
+      classElement.constructors = ConstructorElement.EMPTY_LIST;
     }
     return variableDeclaration;
   }
 
   VariableElement _setupVariableDeclaration(
       String name, bool isConst, bool isInitialized, {isFinal: false}) {
     VariableDeclaration variableDeclaration = isInitialized
         ? AstFactory.variableDeclaration2(name, AstFactory.integer(0))
         : AstFactory.variableDeclaration(name);
     SimpleIdentifier identifier = variableDeclaration.name;
@@ skipping 7175 matching lines @@
     expect(second.category, "Second");
     expect(second.path, "second/second.dart");
     expect(second.shortName, "dart:second");
     expect(second.isDart2JsLibrary, false);
     expect(second.isDocumented, false);
     expect(second.isImplementation, true);
     expect(second.isVmLibrary, false);
   }
 }
 
-
 @reflectiveTest
 class StringScannerTest extends AbstractScannerTest {
   @override
   ht.AbstractScanner newScanner(String input) {
     return new ht.StringScanner(null, input);
   }
 }
 
 /**
  * Instances of the class `ToSourceVisitorTest`
@@ skipping 329 matching lines @@
     if (_expectedExternalScriptName == null) {
       expect(scriptSource, isNull, reason: "script $scriptIndex");
     } else {
       expect(scriptSource, isNotNull, reason: "script $scriptIndex");
       String actualExternalScriptName = scriptSource.shortName;
       expect(actualExternalScriptName, _expectedExternalScriptName,
           reason: "script $scriptIndex");
     }
   }
 }