Use different SDKs based on option settings

pkg/analysis_server/test/context_manager_test.dart

Index: pkg/analysis_server/test/context_manager_test.dart
diff --git a/pkg/analysis_server/test/context_manager_test.dart b/pkg/analysis_server/test/context_manager_test.dart
index cce4de07f7663219604496c88573d1d7a76befc1..ac2a8388fae0d98c578cd7ea7f33f3871ec72aba 100644
--- a/pkg/analysis_server/test/context_manager_test.dart
+++ b/pkg/analysis_server/test/context_manager_test.dart
@@ -2310,7 +2310,11 @@ class TestContextManagerCallbacks extends ContextManagerCallbacks {
   Iterable<String> get currentContextPaths => currentContextTimestamps.keys;
 
   @override
-  AnalysisContext addContext(Folder folder, FolderDisposition disposition) {
+  AnalysisOptions get defaultAnalysisOptions => new AnalysisOptionsImpl();
+
+  @override
+  AnalysisContext addContext(
+      Folder folder, AnalysisOptions options, FolderDisposition disposition) {
     String path = folder.path;
     expect(currentContextPaths, isNot(contains(path)));
     currentContextTimestamps[path] = now;
@@ -2333,6 +2337,7 @@ class TestContextManagerCallbacks extends ContextManagerCallbacks {
     }
     resolvers.addAll(disposition.createPackageUriResolvers(resourceProvider));
     resolvers.add(new FileUriResolver());
+    currentContext.analysisOptions = options;
     currentContext.sourceFactory =
         new SourceFactory(resolvers, disposition.packages);
     return currentContext;