Only have one method for generating a method.

dart/sdk/lib/_internal/compiler/implementation/js_emitter/class_builder.dart

Index: dart/sdk/lib/_internal/compiler/implementation/js_emitter/class_builder.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/js_emitter/class_builder.dart b/dart/sdk/lib/_internal/compiler/implementation/js_emitter/class_builder.dart
index a49ea1a15cce0d433f6a1ce516d49b00cf902078..5a19e8905ace22b77421f84055f056994f1e47b0 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/js_emitter/class_builder.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/js_emitter/class_builder.dart
@@ -21,4 +21,11 @@ class ClassBuilder {
   jsAst.Expression toObjectInitializer() {
     return new jsAst.ObjectInitializer(properties);
   }
+
+  void writeOn(CodeBuffer buffer, Compiler compiler, String separatedBy) {

[sra1, 2013/10/02 16:10:52]

I'm not sure I like writeOn - we have missing sourcemap data in many places and
this pattern makes it more difficult to add sourcemap data.

I'd rather generate an AST for the entire file and have some layout hints to
cause it to pretty-print as you desire.

[ahe, 2013/10/02 16:58:05]

Agreed. I should add a comment making it clear that this is temporary.

+    for (jsAst.Property property in properties) {
+      if (!buffer.isEmpty) buffer.write(separatedBy);
+      buffer.write(jsAst.prettyPrint(property, compiler));
+    }
+  }
 }