Support for overlay only files in Analysis Server with the new driver.

pkg/analysis_server/test/integration/completion/get_suggestions_test.dart

Index: pkg/analysis_server/test/integration/completion/get_suggestions_test.dart
diff --git a/pkg/analysis_server/test/integration/completion/get_suggestions_test.dart b/pkg/analysis_server/test/integration/completion/get_suggestions_test.dart
index 34b455b095a2f26aee1fce04346a4709fcbc9796..d8998217735e2c2b22b20fc947a16381d4addba3 100644
--- a/pkg/analysis_server/test/integration/completion/get_suggestions_test.dart
+++ b/pkg/analysis_server/test/integration/completion/get_suggestions_test.dart
@@ -131,13 +131,6 @@ class GetSuggestionsTest_Driver extends AbstractGetSuggestionsTest {
   bool get enableNewAnalysisDriver => true;
 
   @failingTest
-  test_getSuggestions_onlyOverlay() async {
-    // TimeoutException after 0:00:30.000000: Test timed out after 30 seconds.
-    //return super.test_getSuggestions_onlyOverlay();
-    fail('Test timed out');
-  }
-
-  @failingTest
   test_getSuggestions_sourceMissing_noWait() {
     //  Expected: same instance as 'exception from server'
     //    Actual: CompletionGetSuggestionsResult:<{"id":"0"}>