Typing fixes to eliminate casts/dcalls

test/dart_codegen/expect/async/stream_impl.dart

 part of dart.async;
  abstract class _EventSink<T> {void _add(T data);
  void _addError(Object error, StackTrace stackTrace);
  void _close();
 }
  abstract class _EventDispatch<T> {void _sendData(T data);
  void _sendError(Object error, StackTrace stackTrace);
  void _sendDone();
 }
  class _BufferingStreamSubscription<T> implements StreamSubscription<T>, _EventSink<T>, _EventDispatch<T> {static const int _STATE_CANCEL_ON_ERROR = 1;
@@ skipping 23 matching lines @@
 _state |= _STATE_HAS_PENDING;
  _pending.schedule(this);
 }
 }
  _PendingEvents _extractPending() {
 assert (_isCanceled); _PendingEvents events = _pending;
  _pending = null;
  return events;
 }
  void onData(void handleData(T event)) {
-if (handleData == null) handleData = DEVC$RT.cast(_nullDataHandler, __CastType52, DEVC$RT.type((__CastType50<T> _) {
+if (handleData == null) handleData = DEVC$RT.cast(_nullDataHandler, __CastType47, DEVC$RT.type((__CastType45<T> _) {
 }
-), "CompositeCast", """line 153, column 42 of dart:async/stream_impl.dart: """, _nullDataHandler is __CastType50<T>, false);
- _onData = ((__x54) => DEVC$RT.cast(__x54, ZoneUnaryCallback, DEVC$RT.type((_DataHandler<T> _) {
+), "CompositeCast", """line 153, column 42 of dart:async/stream_impl.dart: """, _nullDataHandler is __CastType45<T>, false);
+ _onData = ((__x49) => DEVC$RT.cast(__x49, ZoneUnaryCallback, DEVC$RT.type((_DataHandler<T> _) {
 }
-), "CompositeCast", """line 154, column 15 of dart:async/stream_impl.dart: """, __x54 is _DataHandler<T>, false))(_zone.registerUnaryCallback(handleData));
+), "CompositeCast", """line 154, column 15 of dart:async/stream_impl.dart: """, __x49 is _DataHandler<T>, false))(_zone.registerUnaryCallback(handleData));
 }
  void onError(Function handleError) {
 if (handleError == null) handleError = _nullErrorHandler;
  _onError = _registerErrorHandler(handleError, _zone);
 }
  void onDone(void handleDone()) {
 if (handleDone == null) handleDone = _nullDoneHandler;
  _onDone = _zone.registerCallback(handleDone);
 }
  void pause([Future resumeSignal]) {
@@ skipping 110 matching lines @@
  _state |= _STATE_IN_CALLBACK;
  _zone.runUnaryGuarded(_onData, data);
  _state &= ~_STATE_IN_CALLBACK;
  _checkState(wasInputPaused);
 }
  void _sendError(Object error, StackTrace stackTrace) {
 assert (!_isCanceled); assert (!_isPaused); assert (!_inCallback); bool wasInputPaused = _isInputPaused;
  void sendError() {
 if (_isCanceled && !_waitsForCancel) return; _state |= _STATE_IN_CALLBACK;
  if (_onError is ZoneBinaryCallback) {
-  _zone.runBinaryGuarded(DEVC$RT.cast(_onError, Function, __CastType55, "ImplicitCast", """line 358, column 32 of dart:async/stream_impl.dart: """, _onError is __CastType55, true), error, stackTrace);
+  _zone.runBinaryGuarded(DEVC$RT.cast(_onError, Function, __CastType50, "ImplicitCast", """line 358, column 32 of dart:async/stream_impl.dart: """, _onError is __CastType50, true), error, stackTrace);
   }
  else {
-  _zone.runUnaryGuarded(DEVC$RT.cast(_onError, Function, __CastType58, "ImplicitCast", """line 360, column 31 of dart:async/stream_impl.dart: """, _onError is __CastType58, true), error);
+  _zone.runUnaryGuarded(DEVC$RT.cast(_onError, Function, __CastType53, "ImplicitCast", """line 360, column 31 of dart:async/stream_impl.dart: """, _onError is __CastType53, true), error);
   }
  _state &= ~_STATE_IN_CALLBACK;
 }
  if (_cancelOnError) {
 _state |= _STATE_WAIT_FOR_CANCEL;
  _cancel();
  if (_cancelFuture is Future) {
   _cancelFuture.whenComplete(sendError);
   }
  else {
@@ skipping 73 matching lines @@
  void _onListen(StreamSubscription subscription) {
 }
 }
  typedef _PendingEvents _EventGenerator();
  class _GeneratedStreamImpl<T> extends _StreamImpl<T> {final _EventGenerator _pending;
  bool _isUsed = false;
  _GeneratedStreamImpl(this._pending);
  StreamSubscription<T> _createSubscription(void onData(T data), Function onError, void onDone(), bool cancelOnError) {
 if (_isUsed) throw new StateError("Stream has already been listened to.");
  _isUsed = true;
- return ((__x60) => DEVC$RT.cast(__x60, DEVC$RT.type((_BufferingStreamSubscription<dynamic> _) {
+ return ((__x55) => DEVC$RT.cast(__x55, DEVC$RT.type((_BufferingStreamSubscription<dynamic> _) {
 }
 ), DEVC$RT.type((StreamSubscription<T> _) {
 }
-), "CompositeCast", """line 515, column 12 of dart:async/stream_impl.dart: """, __x60 is StreamSubscription<T>, false))(new _BufferingStreamSubscription(onData, onError, onDone, cancelOnError).._setPendingEvents(_pending()));
+), "CompositeCast", """line 515, column 12 of dart:async/stream_impl.dart: """, __x55 is StreamSubscription<T>, false))(new _BufferingStreamSubscription(onData, onError, onDone, cancelOnError).._setPendingEvents(_pending()));
 }
 }
  class _IterablePendingEvents<T> extends _PendingEvents {Iterator<T> _iterator;
  _IterablePendingEvents(Iterable<T> data) : _iterator = data.iterator;
  bool get isEmpty => _iterator == null;
  void handleNext(_EventDispatch dispatch) {
 if (_iterator == null) {
 throw new StateError("No events pending.");
 }
  bool isDone;
@@ skipping 165 matching lines @@
  if (isPaused) return; _state |= _DONE_SENT;
  if (_onDone != null) _zone.runGuarded(_onDone);
 }
 }
  class _AsBroadcastStream<T> extends Stream<T> {final Stream<T> _source;
  final _broadcastCallback _onListenHandler;
  final _broadcastCallback _onCancelHandler;
  final Zone _zone;
  _AsBroadcastStreamController<T> _controller;
  StreamSubscription<T> _subscription;
- _AsBroadcastStream(this._source, void onListenHandler(StreamSubscription subscription), void onCancelHandler(StreamSubscription subscription)) : _onListenHandler = ((__x61) => DEVC$RT.cast(__x61, ZoneUnaryCallback, _broadcastCallback, "CompositeCast", """line 813, column 28 of dart:async/stream_impl.dart: """, __x61 is _broadcastCallback, false))(Zone.current.registerUnaryCallback(onListenHandler)), _onCancelHandler = ((__x62) => DEVC$RT.cast(__x62, ZoneUnaryCallback, _broadcastCallback, "CompositeCast", """line 814, column 28 of dart:async/stream_impl.dart: """, __x62 is _broadcastCallback, false))(Zone.current.registerUnaryCallback(onCancelHandler)), _zone = Zone.current {
+ _AsBroadcastStream(this._source, void onListenHandler(StreamSubscription subscription), void onCancelHandler(StreamSubscription subscription)) : _onListenHandler = ((__x56) => DEVC$RT.cast(__x56, ZoneUnaryCallback, _broadcastCallback, "CompositeCast", """line 813, column 28 of dart:async/stream_impl.dart: """, __x56 is _broadcastCallback, false))(Zone.current.registerUnaryCallback(onListenHandler)), _onCancelHandler = ((__x57) => DEVC$RT.cast(__x57, ZoneUnaryCallback, _broadcastCallback, "CompositeCast", """line 814, column 28 of dart:async/stream_impl.dart: """, __x57 is _broadcastCallback, false))(Zone.current.registerUnaryCallback(onCancelHandler)), _zone = Zone.current {
 _controller = new _AsBroadcastStreamController<T>(_onListen, _onCancel);
 }
  bool get isBroadcast => true;
  StreamSubscription<T> listen(void onData(T data), {
 Function onError, void onDone(), bool cancelOnError}
 ) {
 if (_controller == null || _controller.isClosed) {
 return new _DoneStreamSubscription<T>(onDone);
 }
  if (_subscription == null) {
@@ skipping 159 matching lines @@
 }
 ), "CompositeCast", """line 1073, column 31 of dart:async/stream_impl.dart: """, _futureOrPrefetch is _Future<bool>, false);
  _clear();
  hasNext._complete(false);
  return;}
  _subscription.pause();
  _futureOrPrefetch = null;
  _state = _STATE_EXTRA_DONE;
 }
 }
- typedef void __CastType50<T>(T __u51);
- typedef void __CastType52(dynamic __u53);
- typedef dynamic __CastType55(dynamic __u56, dynamic __u57);
- typedef dynamic __CastType58(dynamic __u59);
+ typedef void __CastType45<T>(T __u46);
+ typedef void __CastType47(dynamic __u48);
+ typedef dynamic __CastType50(dynamic __u51, dynamic __u52);
+ typedef dynamic __CastType53(dynamic __u54);