Introduce ConstructorEntity

pkg/compiler/lib/src/js_emitter/interceptor_stub_generator.dart

Index: pkg/compiler/lib/src/js_emitter/interceptor_stub_generator.dart
diff --git a/pkg/compiler/lib/src/js_emitter/interceptor_stub_generator.dart b/pkg/compiler/lib/src/js_emitter/interceptor_stub_generator.dart
index 7c3337eab9e49826aa64c6c16d57cf68b5daa65c..8b13d138c6b4d70dade86ca75e254ac4d34b127c 100644
--- a/pkg/compiler/lib/src/js_emitter/interceptor_stub_generator.dart
+++ b/pkg/compiler/lib/src/js_emitter/interceptor_stub_generator.dart
@@ -404,7 +404,7 @@ class InterceptorStubGenerator {
         //
         // We expect most of the time the map will be a singleton.
         var properties = [];
-        for (FunctionEntity member in analysis.constructors(classElement)) {
+        for (ConstructorEntity member in analysis.constructors(classElement)) {
           properties.add(new jsAst.Property(js.string(member.name),
               backend.emitter.staticFunctionAccess(member)));
         }