Disable analysis in hidden directories (fix for issue 22170)

pkg/analysis_server/test/integration/integration_test_methods.dart

Index: pkg/analysis_server/test/integration/integration_test_methods.dart
diff --git a/pkg/analysis_server/test/integration/integration_test_methods.dart b/pkg/analysis_server/test/integration/integration_test_methods.dart
index 334a3b58787c5565ea797dbb7048b02cc8bfcde1..425f2d9df3f2c4e5b189717c81336be56eb9cef8 100644
--- a/pkg/analysis_server/test/integration/integration_test_methods.dart
+++ b/pkg/analysis_server/test/integration/integration_test_methods.dart
@@ -330,7 +330,8 @@ abstract class IntegrationTestMixin {
   /**
    * Sets the root paths used to determine which files to analyze. The set of
    * files to be analyzed are all of the files in one of the root paths that
-   * are not also in one of the excluded paths.
+   * are not also in one of the excluded paths and do not start with a dot
+   * ('.').
    *
    * Note that this request determines the set of requested analysis roots. The
    * actual set of analysis roots at any given time is the intersection of this