Add ConstructorBodyEntity

pkg/compiler/lib/src/resolution/resolution_strategy.dart

Index: pkg/compiler/lib/src/resolution/resolution_strategy.dart
diff --git a/pkg/compiler/lib/src/resolution/resolution_strategy.dart b/pkg/compiler/lib/src/resolution/resolution_strategy.dart
index 4d8dff91b153ccf76c40fbbf13addb6bb9220183..2c3fd505dd8e7bd33ccb6f3d7dc98c7d84ee26ca 100644
--- a/pkg/compiler/lib/src/resolution/resolution_strategy.dart
+++ b/pkg/compiler/lib/src/resolution/resolution_strategy.dart
@@ -520,6 +520,12 @@ class _CompilerElementEnvironment implements ElementEnvironment {
   }
 
   @override
+  void forEachConstructorBody(
+      covariant ClassElement cls, void f(ConstructorBodyEntity constructor)) {
+    cls.forEachConstructorBody(f);
+  }
+
+  @override
   ClassEntity getSuperClass(covariant ClassElement cls,
       {bool skipUnnamedMixinApplications: false}) {
     cls.ensureResolved(_resolution);