Use shorter names for constructor arguments.

lib/compiler/implementation/namer.dart

Index: lib/compiler/implementation/namer.dart
diff --git a/lib/compiler/implementation/namer.dart b/lib/compiler/implementation/namer.dart
index 7aa40cf6d77579aaca2bc0d81c478bd82ad1901a..8680ac740b738f368376602dd1b798281d124059 100644
--- a/lib/compiler/implementation/namer.dart
+++ b/lib/compiler/implementation/namer.dart
@@ -63,7 +63,11 @@ class Namer {
   }
 
   String instanceFieldName(LibraryElement lib, SourceString name) {
-    return privateName(lib, name);
+    String proposedName = privateName(lib, name);
+    if (jsReserved.contains(proposedName)) {
+      return '$proposedName\$';

[ngeoffray, 2012/04/23 18:38:15]

This code very much looks like JsName.getValid, should you use that instead?

[floitsch, 2012/04/25 08:42:24]

Thanks. Addressed in CL 10223002.

+    }
+    return proposedName;
   }
 
   String setterName(LibraryElement lib, SourceString name) {