Don't print TODOs in Dart based analyzer.

pkg/analyzer/lib/src/analyzer_impl.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer_impl;
 
 import 'dart:async';
 
 import 'dart:io';
 
@@ skipping 135 matching lines @@
       ErrorSeverity status = maxErrorSeverity;
       if (status == ErrorSeverity.WARNING && options.warningsAreFatal) {
         status = ErrorSeverity.ERROR;
       }
       exitCode = status.ordinal;
     }).catchError((ex, st) {
       AnalysisEngine.instance.logger.logError("${ex}\n${st}");
     });
   }
 
+  bool _excludeTodo(AnalysisError error) => error.errorCode.type != ErrorType.TODO;
+
   _printErrorsAndPerf() {
     // The following is a hack. We currently print out to stderr to ensure that
     // when in batch mode we print to stderr, this is because the prints from
     // batch are made to stderr. The reason that options.shouldBatch isn't used
     // is because when the argument flags are constructed in BatchRunner and
     // passed in from batch mode which removes the batch flag to prevent the
     // "cannot have the batch flag and source file" error message.
     IOSink sink = options.machineFormat ? stderr : stdout;
 
     // print errors
-    ErrorFormatter formatter = new ErrorFormatter(sink, options);
+    ErrorFormatter formatter = new ErrorFormatter(sink, options, _excludeTodo);
     formatter.formatErrors(errorInfos);
 
     // print performance numbers
     if (options.perf) {
       int totalTime = JavaSystem.currentTimeMillis() - startTime;
       int ioTime = PerformanceStatistics.io.result;
       int scanTime = PerformanceStatistics.scan.result;
       int parseTime = PerformanceStatistics.parse.result;
       int resolveTime = PerformanceStatistics.resolve.result;
       int errorsTime = PerformanceStatistics.errors.result;
@@ skipping 179 matching lines @@
     }
   }
 
   @override
   void logInformation2(String message, Exception exception) {
     if (log) {
       stdout.writeln(message);
     }
   }
 }