move performance measurement to benchmark/integration

pkg/analysis_server/test/integration/integration_tests.dart

 // Copyright (c) 2014, 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 test.integration.analysis;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:io';
@@ skipping 444 matching lines @@
     for (String line in _recordedStdio) {
       print(line);
     }
   }
 
   /**
    * Find the root directory of the analysis_server package by proceeding
    * upward to the 'test' dir, and then going up one more directory.
    */
   String findRoot(String pathname) {
-    while (basename(pathname) != 'test') {
+    while (!['benchmark', 'test'].contains(basename(pathname))) {
       String parent = dirname(pathname);
       if (parent.length >= pathname.length) {
         throw new Exception("Can't find root directory");
       }
       pathname = parent;
     }
     return dirname(pathname);
   }
 
   /**
@@ skipping 384 matching lines @@
   void populateMismatches(item, List<MismatchDescriber> mismatches);
 
   /**
    * Create a [MismatchDescriber] describing a mismatch with a simple string.
    */
   MismatchDescriber simpleDescription(String description) =>
       (Description mismatchDescription) {
     mismatchDescription.add(description);
   };
 }