update the analyzer and analysis server perf tags

pkg/analyzer_cli/lib/src/analyzer_impl.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.
 
 library analyzer_cli.src.analyzer_impl;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:io';
 
@@ skipping 209 matching lines @@
       return packageName.startsWith(options.showPackageWarningsPrefix);
     }
   }
 
   // TODO(devoncarew): This is never called.
   void _printColdPerf() {
     // Print cold VM performance numbers.
     int totalTime = currentTimeMillis - startTime;
     int otherTime = totalTime;
     for (PerformanceTag tag in PerformanceTag.all) {
-      if (tag != PerformanceTag.UNKNOWN) {
+      if (tag != PerformanceTag.unknown) {
         int tagTime = tag.elapsedMs;
         outSink.writeln('${tag.label}-cold:$tagTime');
         otherTime -= tagTime;
       }
     }
     outSink.writeln('other-cold:$otherTime');
     outSink.writeln("total-cold:$totalTime");
   }
 
   ErrorSeverity _defaultSeverityProcessor(AnalysisError error) =>
@@ skipping 62 matching lines @@
   }
 
   @override
   void logInformation(String message, [CaughtException exception]) {
     outSink.writeln(message);
     if (exception != null) {
       outSink.writeln(exception);
     }
   }
 }