Add ConstructorBodyEntity

pkg/compiler/lib/src/ssa/graph_builder.dart

 // Copyright (c) 2016, 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.
 
 import '../closure.dart' show ClosureDataLookup;
 import '../constants/constant_system.dart';
 import '../common/codegen.dart' show CodegenRegistry;
 import '../common_elements.dart';
 import '../compiler.dart';
 import '../deferred_load.dart';
@@ skipping 225 matching lines @@
   }
 
   HSubExpressionBlockInformation wrapExpressionGraph(SubExpression expression) {
     if (expression == null) return null;
     return new HSubExpressionBlockInformation(expression);
   }
 
   /// Returns the current source element.
   ///
   /// The returned element is a declaration element.
-  Element get sourceElement;
+  MemberEntity get sourceElement;
 
   // TODO(karlklose): this is needed to avoid a bug where the resolved type is
   // not stored on a type annotation in the closure translator. Remove when
   // fixed.
   bool hasDirectLocal(Local local) {
     return !localsHandler.isAccessedDirectly(local) ||
         localsHandler.directLocals[local] != null;
   }
 
   HInstruction callSetRuntimeTypeInfoWithTypeArguments(InterfaceType type,
@@ skipping 41 matching lines @@
         return mirrorsData.mustRetainMetadata;
       case 'USE_CONTENT_SECURITY_POLICY':
         return options.useContentSecurityPolicy;
       case 'IS_FULL_EMITTER':
         return !USE_LAZY_EMITTER && !options.useStartupEmitter;
       default:
         return null;
     }
   }
 }