Add summary support for ConstructorElement.nameEnd and .periodOffset.

pkg/analyzer/lib/src/summary/summarize_elements.dart

 // Copyright (c) 2015, 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.
 
 library serialization.elements;
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/dart/element/member.dart';
@@ skipping 538 matching lines @@
   }
 
   /**
    * Serialize the given [executableElement], creating an [UnlinkedExecutable].
    */
   UnlinkedExecutableBuilder serializeExecutable(
       ExecutableElement executableElement) {
     UnlinkedExecutableBuilder b = new UnlinkedExecutableBuilder();
     b.name = executableElement.name;
     b.nameOffset = executableElement.nameOffset;
-    if (executableElement is! ConstructorElement) {
+    if (executableElement is ConstructorElement) {
+      if (executableElement.name.isNotEmpty) {
+        b.nameEnd = executableElement.nameEnd;
+        b.periodOffset = executableElement.periodOffset;
+      }
+    } else {
       if (!executableElement.hasImplicitReturnType) {
         b.returnType = serializeTypeRef(
             executableElement.type.returnType, executableElement);
       } else if (!executableElement.isStatic) {
         b.inferredReturnTypeSlot =
             storeInferredType(executableElement.returnType, executableElement);
       }
     }
     b.typeParameters =
         executableElement.typeParameters.map(serializeTypeParam).toList();
@@ skipping 858 matching lines @@
       exportNames.add(new LinkedExportNameBuilder(
           name: name,
           dependency: serializeDependency(dependentLibrary),
           unit: unit,
           kind: kind));
     }
     pb.exportNames = exportNames;
     return pb;
   }
 }