Analysis server context ID is now specified by the client.

pkg/analysis_server/test/analysis_server_test.dart

Index: pkg/analysis_server/test/analysis_server_test.dart
diff --git a/pkg/analysis_server/test/analysis_server_test.dart b/pkg/analysis_server/test/analysis_server_test.dart
index 380e6204d961022696abf8c8d1ea93f2444b1cb0..68c4cc5b6dac51c9213d396d3d0056fa300aace0 100644
--- a/pkg/analysis_server/test/analysis_server_test.dart
+++ b/pkg/analysis_server/test/analysis_server_test.dart
@@ -36,13 +36,12 @@ class AnalysisServerTest {
     server.handlers = [new ServerDomainHandler(server)];
     var request = new Request('my27', ServerDomainHandler.CREATE_CONTEXT_METHOD);
     request.setParameter(ServerDomainHandler.SDK_DIRECTORY_PARAM, sdkPath);
+    request.setParameter(ServerDomainHandler.CONTEXT_ID_PARAM, 'ctx');
     return channel.sendRequest(request)
         .timeout(new Duration(seconds: 1))
         .then((Response response) {
           expect(response.id, equals('my27'));
           expect(response.error, isNull);
-          var contextId = response.result[ServerDomainHandler.CONTEXT_ID_RESULT];
-          expect(contextId is String, isTrue);
         });
   }