Move back to having File.open{Input,Output}Stream return the stream directly.

tools/testing/dart/status_file_parser.dart

Index: tools/testing/dart/status_file_parser.dart
diff --git a/tools/testing/dart/status_file_parser.dart b/tools/testing/dart/status_file_parser.dart
index ec701111fe3cb5c942eee4a826e3ac1c58412c20..58e24831d55f2c2d489390d7f14cbcd02d3cc9b1 100644
--- a/tools/testing/dart/status_file_parser.dart
+++ b/tools/testing/dart/status_file_parser.dart
@@ -59,14 +59,7 @@ void ReadConfigurationInto(path, sections, onDone) {
   if (!file.existsSync()) {
     throw new Exception('Cannot find test status file $path');
   }
-  // TODO(1797): When the checked in binary is updated to include the
-  // openInputStreamSync API remove this try/catch.
-  InputStream file_stream;
-  try {
-    file_stream = file.openInputStreamSync();
-  } catch (NoSuchMethodException e) {
-    file_stream = file.openInputStream();
-  }
+  InputStream file_stream = file.openInputStream();
   StringInputStream lines = new StringInputStream(file_stream);
 
   Section current = new Section.always();