Generate getters and setters dynamically.

lib/compiler/implementation/native_emitter.dart

Index: lib/compiler/implementation/native_emitter.dart
diff --git a/lib/compiler/implementation/native_emitter.dart b/lib/compiler/implementation/native_emitter.dart
index c38dc23e7502496373cbf17c761898c0eca4de8a..e4e977b7b94817f843328fa7ae5e7806539646f2 100644
--- a/lib/compiler/implementation/native_emitter.dart
+++ b/lib/compiler/implementation/native_emitter.dart
@@ -84,7 +84,9 @@ class NativeEmitter {
 
     for (Element member in classElement.members) {
       if (member.isInstanceMember()) {
-        compiler.emitter.addInstanceMember(member, defineInstanceMember);
+        bool needGettersAndSetters = true;
+        compiler.emitter.addInstanceMember(
+            member, needGettersAndSetters, defineInstanceMember);
       }
     }
   }
@@ -129,7 +131,9 @@ class NativeEmitter {
 
     for (Element member in classElement.members) {
       if (member.isInstanceMember()) {
-        compiler.emitter.addInstanceMember(member, defineInstanceMember);
+        bool needGettersAndSetters = true;
+        compiler.emitter.addInstanceMember(
+          member, needGettersAndSetters, defineInstanceMember);
       }
     }