Implement 'analysis.getErrors' for the new driver.

pkg/analysis_server/test/integration/analysis/get_errors_after_analysis_test.dart

Index: pkg/analysis_server/test/integration/analysis/get_errors_after_analysis_test.dart
diff --git a/pkg/analysis_server/test/integration/analysis/get_errors_after_analysis_test.dart b/pkg/analysis_server/test/integration/analysis/get_errors_after_analysis_test.dart
index e7d57c575b14410316bb678fecb71a4d60323aa4..81ab90596886abba72a67d4de6cd394a08acb2ff 100644
--- a/pkg/analysis_server/test/integration/analysis/get_errors_after_analysis_test.dart
+++ b/pkg/analysis_server/test/integration/analysis/get_errors_after_analysis_test.dart
@@ -24,27 +24,4 @@ class GetErrorsAfterTest extends AbstractGetErrorsAfterTest {}
 class GetErrorsAfterTest_Driver extends AbstractGetErrorsAfterTest {
   @override
   bool get enableNewAnalysisDriver => true;
-
-  @failingTest
-  test_getErrors() {
-    //   UnimplementedError: Server responded with an error:
-    // {"error":{"code":"SERVER_ERROR","message":"Bad state: Should not be used with the new analysis driver","stackTrace":"
-    // #0      ContextManagerImpl.folderMap (package:analysis_server/src/context_manager.dart:550:7)
-    // #1      ContextManagerImpl.analysisContexts (package:analysis_server/src/context_manager.dart:546:53)
-    // #2      AnalysisServer.analysisContexts (package:analysis_server/src/analysis_server.dart:453:22)
-    // #3      AnalysisServer.getContextSourcePair (package:analysis_server/src/analysis_server.dart:722:37)
-    // #4      AnalysisServer.getAnalysisContext (package:analysis_server/src/analysis_server.dart:590:12)
-    // #5      AnalysisServer.onFileAnalysisComplete (package:analysis_server/src/analysis_server.dart:948:31)
-    // #6      AnalysisDomainHandler.getErrors (package:analysis_server/src/domain_analysis.dart:54:16)
-    // #7      AnalysisDomainHandler.handleRequest (package:analysis_server/src/domain_analysis.dart:201:16)
-    // #8      AnalysisServer.handleRequest.<anonymous closure>.<anonymous closure> (package:analysis_server/src/analysis_server.dart:873:45)
-    // #9      _PerformanceTagImpl.makeCurrentWhile (package:analyzer/src/generated/utilities_general.dart:189:15)
-    // #10     AnalysisServer.handleRequest.<anonymous closure> (package:analysis_server/src/analysis_server.dart:869:50)
-    // #11     _rootRun (dart:async/zone.dart:1150)
-    // #12     _CustomZone.run (dart:async/zone.dart:1026)
-    // #13     _CustomZone.runGuarded (dart:async/zone.dart:924)
-    // #14     runZoned (dart:async/zone.dart:1501)
-    // #15     AnalysisServer.handleRequest (package:analysis_server/src/analysis_server.dart:868:5)
-    return super.test_getErrors();
-  }
 }