Integration of the new analysis driver, behind a flag.

pkg/analysis_server/lib/src/domain_completion.dart

Index: pkg/analysis_server/lib/src/domain_completion.dart
diff --git a/pkg/analysis_server/lib/src/domain_completion.dart b/pkg/analysis_server/lib/src/domain_completion.dart
index f9ea745ddb21eb2c44f30ba53c7a6ac928690b86..4c2221a6ff016e2beb481e7d1a4199d4e0b8b5e3 100644
--- a/pkg/analysis_server/lib/src/domain_completion.dart
+++ b/pkg/analysis_server/lib/src/domain_completion.dart
@@ -102,6 +102,10 @@ class CompletionDomainHandler implements RequestHandler {
 
   @override
   Response handleRequest(Request request) {
+    if (server.options.enableNewAnalysisDriver) {
+      // TODO(scheglov) implement for the new analysis driver
+      return new CompletionGetSuggestionsResult('0').toResponse(request.id);
+    }
     if (server.searchEngine == null) {
       return new Response.noIndexGenerated(request);
     }