Enable several completion tests with the new analysis driver.

pkg/analysis_server/test/services/completion/dart/combinator_contributor_test.dart

Index: pkg/analysis_server/test/services/completion/dart/combinator_contributor_test.dart
diff --git a/pkg/analysis_server/test/services/completion/dart/combinator_contributor_test.dart b/pkg/analysis_server/test/services/completion/dart/combinator_contributor_test.dart
index 3ce88ef2e11a368ef5858d9c3d3b0f1b8adb7e70..4290b2f00b7d01e36bb12d3991aba6dc1de00f10 100644
--- a/pkg/analysis_server/test/services/completion/dart/combinator_contributor_test.dart
+++ b/pkg/analysis_server/test/services/completion/dart/combinator_contributor_test.dart
@@ -65,7 +65,9 @@ class CombinatorContributorTest extends DartCompletionContributorTest {
       class X {}''');
 
     // Assume that imported libraries have been resolved
-    context.resolveCompilationUnit2(importedLibSource, importedLibSource);
+    if (!enableNewAnalysisDriver) {
+      context.resolveCompilationUnit2(importedLibSource, importedLibSource);
+    }
 
     await computeSuggestions();
     assertSuggestClass('A',
@@ -117,7 +119,9 @@ class CombinatorContributorTest extends DartCompletionContributorTest {
       class X {}''');
 
     // Assume that imported libraries have been resolved
-    context.resolveCompilationUnit2(importedLibSource, importedLibSource);
+    if (!enableNewAnalysisDriver) {
+      context.resolveCompilationUnit2(importedLibSource, importedLibSource);
+    }
 
     await computeSuggestions();
     assertSuggestClass('A',
@@ -157,18 +161,4 @@ class CombinatorContributorTest extends DartCompletionContributorTest {
 class CombinatorContributorTest_Driver extends CombinatorContributorTest {
   @override
   bool get enableNewAnalysisDriver => true;
-
-  @failingTest
-  @override
-  test_Combinator_hide() {
-//    Bad state: Should not be used with the new analysis driver.
-    return super.test_Combinator_hide();
-  }
-
-  @failingTest
-  @override
-  test_Combinator_show() {
-//    Bad state: Should not be used with the new analysis driver.
-    return super.test_Combinator_show();
-  }
 }