rename ddc -> dev_compiler, fixes #84

test/dart_codegen/expect/async/timer.dart

 part of dart.async;
  abstract class Timer {factory Timer(Duration duration, void callback()) {
   if (Zone.current == Zone.ROOT) {
     return Zone.current.createTimer(duration, callback);
     }
    return Zone.current.createTimer(duration, Zone.current.bindCallback(callback, runGuarded: true));
   }
  factory Timer.periodic(Duration duration, void callback(Timer timer)) {
   if (Zone.current == Zone.ROOT) {
     return Zone.current.createPeriodicTimer(duration, callback);
     }
-   return Zone.current.createPeriodicTimer(duration, Zone.current.bindUnaryCallback(DDC$RT.wrap((void f(Timer __u162)) {
-    void c(Timer x0) => f(DDC$RT.cast(x0, dynamic, Timer, "CastParam", """line 80, column 50 of dart:async/timer.dart: """, x0 is Timer, true));
+   return Zone.current.createPeriodicTimer(duration, Zone.current.bindUnaryCallback(DEVC$RT.wrap((void f(Timer __u162)) {
+    void c(Timer x0) => f(DEVC$RT.cast(x0, dynamic, Timer, "CastParam", """line 80, column 50 of dart:async/timer.dart: """, x0 is Timer, true));
      return f == null ? null : c;
     }
   , callback, __t165, __t163, "Wrap", """line 80, column 50 of dart:async/timer.dart: """, callback is __t163), runGuarded: true));
   }
  static void run(void callback()) {
   new Timer(Duration.ZERO, callback);
   }
  void cancel();
  bool get isActive;
  external static Timer _createTimer(Duration duration, void callback());
  external static Timer _createPeriodicTimer(Duration duration, void callback(Timer timer));
 }
  typedef dynamic __t163(dynamic __u164);
  typedef void __t165(Timer __u166);