dart2js: Add newline in minified mode.

pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart

Index: pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
index b5d2fbad17e1112c8df3e5dbae4c50273937414c..31fdea5e63f962ac523e5f3d3a2469f4df1e7352 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
@@ -644,7 +644,9 @@ class OldEmitter implements Emitter {
               js.statement('var ${namer.deferredTypesName} = #;',
                            constructList(types)),
               compiler, monitor: compiler.dumpInfoTask));
-      output.add(n);
+      if (compiler.enableMinification) {
+        output.add('\n');

[herhut, 2015/04/10 13:01:57]

How about output.add(N)? That will turn into ";\n" in non-minified and '\n' in
minified mode. The ';' from the js.statement is probably swallowed anyway, no?

[zarah, 2015/04/10 13:05:54]

No, then in minified mode there will be two ';'s. As agreed it stays like this
then.

[zarah, 2015/04/10 13:20:24]

sorry, non-minified, just for the record.

+      }
     }
   }