Report errors for the new top-level inference rules.

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 8fb481810e7c595511cc35ea41b9c0503c50cee1..f4c6ea419d6002a30eede3bd85047c589d2e5546 100644
--- a/pkg/dev_compiler/tool/sdk_expected_errors.txt
+++ b/pkg/dev_compiler/tool/sdk_expected_errors.txt
@@ -55,6 +55,7 @@ Consider passing explicit type argument(s) to the generic.
 [error] Invalid override. The type of 'ZLibEncoder.startChunkedConversion' ('(Sink<List<int>>) → ByteConversionSink') isn't a subtype of 'ChunkedConverter<List<int>, List<int>, List<int>, List<int>>.startChunkedConversion' ('(dynamic) → dynamic'). (dart:io/data_transformer.dart, line 388, col 3)
 [error] The argument type '(RandomAccessFile) → Future<RandomAccessFile>' can't be assigned to the parameter type '(RandomAccessFile) → FutureOr<File>'. (dart:io/file_impl.dart, line 202, col 30)
 [error] The return type 'Future<Object>' isn't a 'FutureOr<File>', as defined by the method ''. (dart:io/file_impl.dart, line 591, col 14)
+[error] The type of '_startTime' can't be inferred because of the use of the instance getter 'millisecondsSinceEpoch'. (dart:io/io_resource_info.dart, line 14, col 48)
 [error] Undefined name 'lineMode'. (dart:io/stdio.dart, line 57, col 10)
 [error] The name 'echoMode=' is already defined. (dart:io/stdio.dart, line 122, col 12)
 [error] The name 'lineMode=' is already defined. (dart:io/stdio.dart, line 143, col 12)