Use destructuring assignments for named parameters (#180)

tool/sdk_expected_errors.txt

Index: tool/sdk_expected_errors.txt
diff --git a/tool/sdk_expected_errors.txt b/tool/sdk_expected_errors.txt
index ca6d037e7feaba5697f83935c85903020e89f5c0..a6c50f7855c3b02f22dea9a557b653b62eb78dd4 100644
--- a/tool/sdk_expected_errors.txt
+++ b/tool/sdk_expected_errors.txt
@@ -3,6 +3,12 @@ severe: [AnalyzerMessage] Missing concrete implementation of 'num.==' (dart:_int
 severe: [AnalyzerMessage] Missing concrete implementation of 'String.==' (dart:_interceptors/js_string.dart, line 14, col 7)
 severe: [AnalyzerMessage] The redirected constructor '((Stream<dynamic>, bool) → StreamSubscription<dynamic>) → _StreamSubscriptionTransformer<dynamic, dynamic>' has incompatible parameters with '((Stream<S>, bool) → StreamSubscription<T>) → StreamTransformer<S, T>' (dart:async/stream.dart, line 1571, col 9)
 severe: [AnalyzerMessage] The redirected constructor '({handleData: (dynamic, EventSink<dynamic>) → void, handleError: (Object, StackTrace, EventSink<dynamic>) → void, handleDone: (EventSink<dynamic>) → void}) → _StreamHandlerTransformer<dynamic, dynamic>' has incompatible parameters with '({handleData: (S, EventSink<T>) → void, handleError: (Object, StackTrace, EventSink<T>) → void, handleDone: (EventSink<T>) → void}) → StreamTransformer<S, T>' (dart:async/stream.dart, line 1588, col 13)
+severe: [AnalyzerMessage] The type '_NoCallbackSyncStreamController' is declared with 0 type parameters, but 1 type arguments were given (dart:async/stream_controller.dart, line 84, col 17)
+severe: [AnalyzerMessage] The type '_NoCallbackAsyncStreamController' is declared with 0 type parameters, but 1 type arguments were given (dart:async/stream_controller.dart, line 85, col 17)
+severe: [AnalyzerMessage] The name 'T' is not a type and cannot be used as a parameterized type (dart:async/stream_controller.dart, line 653, col 69)
+severe: [AnalyzerMessage] The name 'T' is not a type and cannot be used as a parameterized type (dart:async/stream_controller.dart, line 654, col 46)
+severe: [AnalyzerMessage] The name 'T' is not a type and cannot be used as a parameterized type (dart:async/stream_controller.dart, line 656, col 68)
+severe: [AnalyzerMessage] The name 'T' is not a type and cannot be used as a parameterized type (dart:async/stream_controller.dart, line 657, col 45)
 severe: [AnalyzerMessage] The redirected constructor '((List<dynamic>) → void) → _SimpleCallbackSink<dynamic>' has incompatible parameters with '((List<T>) → void) → ChunkedConversionSink<T>' (dart:convert/chunked_conversion.dart, line 23, col 45)
 severe: [AnalyzerMessage] The redirected constructor '(Iterable<E>) → LinkedHashSet<E>' has incompatible parameters with '(Iterable<dynamic>) → Set<E>' (dart:core/set.dart, line 75, col 41)
 warning: [DownCastComposite] doneHandlers (dynamic) will need runtime check to cast to type Iterable<SendPort> (dart:_isolate_helper, line 574, col 29)
@@ -65,7 +71,7 @@ warning: [DownCastComposite] timeout2 (Function) will need runtime check to cast
 warning: [DownCastComposite] zone.registerUnaryCallback(onTimeout) ((dynamic) → dynamic) will need runtime check to cast to type (EventSink<dynamic>) → void (dart:async/stream.dart, line 1246, col 21)
 warning: [DownCastComposite] timeout2 (Function) will need runtime check to cast to type () → void (dart:async/stream.dart, line 1257, col 43)
 warning: [DownCastComposite] timeout2 (Function) will need runtime check to cast to type () → void (dart:async/stream.dart, line 1276, col 53)
-warning: [DownCastComposite] sync ? new _NoCallbackSyncStreamController() : new _NoCallbackAsyncStreamController() (_StreamController<dynamic>) will need runtime check to cast to type StreamController<T> (dart:async/stream_controller.dart, line 83, col 14)
+warning: [DownCastComposite] sync ? new _NoCallbackSyncStreamController<T>() : new _NoCallbackAsyncStreamController<T>() (_StreamController<dynamic>) will need runtime check to cast to type StreamController<T> (dart:async/stream_controller.dart, line 83, col 14)
 warning: [DownCastComposite] subscription (_ControllerSubscription<dynamic>) will need runtime check to cast to type StreamSubscription<T> (dart:async/stream_controller.dart, line 516, col 12)
 warning: [DownCastComposite] controller (_StreamController<dynamic>) will need runtime check to cast to type _EventSink<T> (dart:async/stream_controller.dart, line 798, col 15)
 warning: [DownCastComposite] _nullDataHandler ((dynamic) → void) will need runtime check to cast to type (T) → void (dart:async/stream_impl.dart, line 153, col 42)