Support constructor declarations in analyzer2dart.

pkg/analyzer2dart/test/sexpr_data.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.
 
 /// Test data for sexpr_test.
 library test.sexpr.data;
 
 import 'test_helper.dart';
 
 class TestSpec extends TestSpecBase {
@@ skipping 1365 matching lines @@
               (InvokeContinuation return (v2))))))
         (LetCont ((k1 (v3)
             (LetCont ((k2 (v4)
                 (LetPrim (v5 (Constant (Null)))
                   (InvokeContinuation return (v5)))))
               (InvokeStatic print (v3) k2))))
           (InvokeMethod v1 call () k1)))))
     (InvokeStatic print (x) k0)))
 ''', skipInAnalyzerFrontend: true)
   ]),
+
+  const Group('Constructors', const <TestSpec>[
+    const TestSpec('''
+class C {
+  C() {}
+}
+main() {
+  return new C();
+}
+''',
+    const {
+'main': '''
+(FunctionDefinition main () return ()
+  (LetCont ((k0 (v0)
+      (InvokeContinuation return (v0))))
+    (InvokeConstructor C () k0)))
+''',
+'C.': '''
+(FunctionDefinition  () return ()
+  (LetPrim (v0 (Constant (Null)))
+    (InvokeContinuation return (v0))))
+'''}),
+  ]),
 ];