Update the analysis server integration tests to always run on the analysis driver.

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 ebd6ff8d501d678acb37f3ccd56adf6208f1077f..2f3b866a985409f0b90228f3e2def7ad13bef342 100644
--- a/pkg/analysis_server/test/integration/integration_tests.dart
+++ b/pkg/analysis_server/test/integration/integration_tests.dart
@@ -125,7 +125,8 @@ abstract class AbstractAnalysisServerIntegrationTest
    */
   bool _subscribedToServerStatus = false;
 
-  List<AnalysisError> getErrors(String pathname) => currentAnalysisErrors[pathname];
+  List<AnalysisError> getErrors(String pathname) =>
+      currentAnalysisErrors[pathname];
 
   AbstractAnalysisServerIntegrationTest() {
     initializeInttestMixin();
@@ -156,11 +157,6 @@ abstract class AbstractAnalysisServerIntegrationTest
   }
 
   /**
-   * Return `true` if the new analysis driver should be used by these tests.
-   */
-  bool get enableNewAnalysisDriver => false;
-
-  /**
    * Print out any messages exchanged with the server.  If some messages have
    * already been exchanged with the server, they are printed out immediately.
    */
@@ -250,7 +246,6 @@ abstract class AbstractAnalysisServerIntegrationTest
       server.start(
           checked: checked,
           diagnosticPort: diagnosticPort,
-          enableNewAnalysisDriver: enableNewAnalysisDriver,
           servicesPort: servicesPort);
 
   /**
@@ -659,7 +654,6 @@ class Server {
   Future start(
       {bool checked: true,
       int diagnosticPort,
-      bool enableNewAnalysisDriver: false,
       bool noErrorNotification: false,
       bool profileServer: false,
       String sdkPath,
@@ -713,9 +707,6 @@ class Server {
     if (useAnalysisHighlight2) {
       arguments.add('--useAnalysisHighlight2');
     }
-    if (!enableNewAnalysisDriver) {
-      arguments.add('--disable-new-analysis-driver');
-    }
     if (noErrorNotification) {
       arguments.add('--no-error-notification');
     }