Steps towards making the convert library strong-mode compliant.

pkg/analysis_server/benchmark/integration/input_converter.dart

Index: pkg/analysis_server/benchmark/integration/input_converter.dart
diff --git a/pkg/analysis_server/benchmark/integration/input_converter.dart b/pkg/analysis_server/benchmark/integration/input_converter.dart
index f61984515be36e7a4f2239e5e466bd9be82b584c..d743d6cc1fd09748b045b1709ce1d97aedae79d5 100644
--- a/pkg/analysis_server/benchmark/integration/input_converter.dart
+++ b/pkg/analysis_server/benchmark/integration/input_converter.dart
@@ -271,7 +271,9 @@ abstract class CommonInputConverter extends Converter<String, Operation> {
  * into a series of operations to be sent to the analysis server.
  * The input stream can be either an instrumenation or log file.
  */
-class InputConverter extends Converter<String, Operation> {
+class InputConverter
+    extends ChunkedConverter<String, Operation, String, Operation> {
+
   final Logger logger = new Logger('InputConverter');
 
   /**