Fix type errors in sort().

pkg/dev_compiler/tool/sdk_expected_errors.txt

Index: pkg/dev_compiler/tool/sdk_expected_errors.txt
diff --git a/pkg/dev_compiler/tool/sdk_expected_errors.txt b/pkg/dev_compiler/tool/sdk_expected_errors.txt
index ac109270e49d5a1cef158478d4085ac92f3efddd..93356e3605bbff8ebc6a00d88301b89a304bdd2f 100644
--- a/pkg/dev_compiler/tool/sdk_expected_errors.txt
+++ b/pkg/dev_compiler/tool/sdk_expected_errors.txt
@@ -1,11 +1,8 @@
 [error] The argument type 'InternalMap' cannot be assigned to the parameter type 'Map'. (dart:_isolate_helper/isolate_serialization.dart, line 47, col 47)
-[error] Could not infer type parameter E, E must be of type <bottom>. (dart:_interceptors/js_array.dart, line 466, col 10)
-[error] Base class introduces an invalid override. The type of JSArray.[]= ((int, E) → void) is not a subtype of JSMutableIndexable.[]= ((int, dynamic) → dynamic). (dart:_interceptors/js_array.dart, line 586, col 25)
+[error] Base class introduces an invalid override. The type of JSArray.[]= ((int, E) → void) is not a subtype of JSMutableIndexable.[]= ((int, dynamic) → dynamic). (dart:_interceptors/js_array.dart, line 590, col 25)
 [error] Invalid override. The type of NativeTypedArrayOfDouble.[]= ((int, num) → void) is not a subtype of JSMutableIndexable.[]= ((int, dynamic) → dynamic). (dart:_native_typed_data, line 793, col 3)
 [error] Could not infer type parameter T, _ControllerEventSinkWrapper<dynamic> must be of type EventSink<T>. (dart:async/stream.dart, line 1346, col 16)
 [error] The argument type '_ControllerEventSinkWrapper' cannot be assigned to the parameter type 'EventSink<T>'. (dart:async/stream.dart, line 1346, col 53)
-[error] Could not infer type parameter E, E must be of type Comparable<dynamic>. (dart:collection/list.dart, line 312, col 12)
-[error] The argument type 'ListMixin<E>' cannot be assigned to the parameter type 'List<Comparable>'. (dart:collection/list.dart, line 312, col 17)
 [error] Invalid override. The type of ChunkedConverter.bind ((dynamic) → dynamic) is not a subtype of Converter<S, T>.bind ((Stream<S>) → Stream<T>). (dart:convert/chunked_conversion.dart, line 14, col 3)
 [error] Invalid override. The type of ChunkedConverter.bind ((dynamic) → dynamic) is not a subtype of StreamTransformer<S, T>.bind ((Stream<S>) → Stream<T>). (dart:convert/chunked_conversion.dart, line 14, col 3)
 [error] Invalid override. The type of ChunkedConverter.startChunkedConversion ((dynamic) → dynamic) is not a subtype of Converter<S, T>.startChunkedConversion ((Sink<T>) → Sink<S>). (dart:convert/chunked_conversion.dart, line 15, col 3)
@@ -45,8 +42,7 @@
 [warning] Unsound implicit cast from dynamic to E (dart:_interceptors/js_array.dart, line 300, col 17)
 [warning] Unsound implicit cast from dynamic to E (dart:_interceptors/js_array.dart, line 443, col 27)
 [warning] Unsound implicit cast from dynamic to E (dart:_interceptors/js_array.dart, line 455, col 27)
-[warning] Unsound implicit cast from (<bottom>, <bottom>) → int to (E, E) → int (dart:_interceptors/js_array.dart, line 466, col 21)
-[warning] Unsound implicit cast from dynamic to E (dart:_interceptors/js_array.dart, line 560, col 12)
+[warning] Unsound implicit cast from dynamic to E (dart:_interceptors/js_array.dart, line 564, col 12)
 [warning] Unsound implicit cast from dynamic to JSArray<String> (dart:_js_helper, line 80, col 37)
 [warning] Unsound implicit cast from dynamic to E (dart:_js_helper, line 883, col 16)
 [warning] Unsound implicit cast from dynamic to () → List<Type> (dart:_js_mirrors, line 356, col 40)