CLI cleanup.

pkg/analyzer_cli/lib/src/build_mode.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.build_mode;
 
 import 'dart:core' hide Resource;
 import 'dart:io' as io;
 
 import 'package:analyzer/dart/ast/ast.dart' show CompilationUnit;
@@ skipping 44 matching lines @@
    * Performs analysis with given [options].
    */
   void analyze(CommandLineOptions options) {
     new BuildMode(options, new AnalysisStats()).analyze();
     AnalysisEngine.instance.clearCaches();
   }
 
   /**
    * Perform a single loop step.
    */
+  @override
   WorkResponse performRequest(WorkRequest request) {
     errorBuffer.clear();
     outBuffer.clear();
     try {
       // Add in the dart-sdk argument if `dartSdkPath` is not null, otherwise it
       // will try to find the currently installed sdk.
       var arguments = new List.from(request.arguments);
       if (dartSdkPath != null &&
           !arguments.any((arg) => arg.startsWith('--dart-sdk'))) {
         arguments.add('--dart-sdk=$dartSdkPath');
@@ skipping 295 matching lines @@
             'Illegal input file (must be "\$uri|\$path"): $sourceFile');
         return null;
       }
       Uri uri = Uri.parse(sourceFile.substring(0, pipeIndex));
       String path = sourceFile.substring(pipeIndex + 1);
       uriToFileMap[uri] = new JavaFile(path);
     }
     return uriToFileMap;
   }
 }