Implement using AnalysisDriver in analyzer_cli. Disabled.

pkg/analyzer/lib/src/dart/analysis/driver.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:typed_data';
 
 import 'package:analyzer/context/declared_variables.dart';
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 1465 matching lines @@
       _level++;
       return f();
     } finally {
       _level--;
       int ms = timer.elapsedMilliseconds;
       writeln('--- $msg in $ms ms.');
     }
   }
 
   /**
-   * Write a new line into the log
+   * Write a new line into the log.
    */
   void writeln(String msg) {
-    String indent = '\t' * _level;
-    sink.writeln('$indent$msg');
+    if (sink != null) {
+      String indent = '\t' * _level;
+      sink.writeln('$indent$msg');
+    }
   }
 }
 
 /**
  * The performance measurement section for operations that start and end
  * at different place in code, so cannot be run using [PerformanceLog.run].
  *
  * The client must call [exit] for every [PerformanceLog.enter].
  */
 class PerformanceLogSection {
@@ skipping 178 matching lines @@
           libraryDeclarations.add(new TopLevelDeclarationInSource(
               file.source, declaration, isExported));
         }
       }
     }
 
     // We're not done yet.
     return false;
   }
 }