Update to latest analyzer

lib/src/report.dart

 // Copyright (c) 2015, 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.
 
 /// Summarizes the information produced by the checker.
 library dev_compiler.src.report;
 
 import 'dart:math' show max;
 
 import 'package:analyzer/src/generated/engine.dart' show AnalysisContext;
@@ skipping 44 matching lines @@
 
   void onError(AnalysisError error) {
     _errors.add(error);
   }
 }
 
 ErrorSeverity _strongModeErrorSeverity(AnalysisError error) {
   // Upgrade analyzer warnings to errors.
   // TODO(jmesserly: reconcile this with analyzer_cli
   var severity = error.errorCode.errorSeverity;
-  if (!error.errorCode.name.startsWith('dev_compiler.') &&
+  if (!isStrongModeError(error.errorCode) &&
       severity == ErrorSeverity.WARNING) {
     return ErrorSeverity.ERROR;
   }
   return severity;
 }
 
 /// Simple reporter that logs checker messages as they are seen.
 class LogReporter implements AnalysisErrorListener {
   final AnalysisContext _context;
   final bool useColors;
@@ skipping 285 matching lines @@
 
   visitMessage(MessageSummary message) {
     var kind = message.kind;
     errorCount.putIfAbsent(currentPackage, () => <String, int>{});
     errorCount[currentPackage].putIfAbsent(kind, () => 0);
     errorCount[currentPackage][kind]++;
     totals.putIfAbsent(kind, () => 0);
     totals[kind]++;
   }
 }