move performance measurement to benchmark/integration

pkg/analysis_server/test/integration/integration_tests.dart

Index: pkg/analysis_server/test/integration/integration_tests.dart
diff --git a/pkg/analysis_server/test/integration/integration_tests.dart b/pkg/analysis_server/test/integration/integration_tests.dart
index 5471bda56f754d569efd29104b3c1d769ea2d89a..faec89f54533e1c500ea54402bdb33ddae75d38d 100644
--- a/pkg/analysis_server/test/integration/integration_tests.dart
+++ b/pkg/analysis_server/test/integration/integration_tests.dart
@@ -462,7 +462,7 @@ class Server {
    * 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");