First steps toward generating fully linked summaries from ASTs.

pkg/analyzer/test/src/summary/prelinker_test.dart

Index: pkg/analyzer/test/src/summary/prelinker_test.dart
diff --git a/pkg/analyzer/test/src/summary/prelinker_test.dart b/pkg/analyzer/test/src/summary/prelinker_test.dart
index 4453ab0b08ebcfbd6e7e42848f9bc9f1631748d9..b4d40983fe5042e2793e454d436308b759f298d0 100644
--- a/pkg/analyzer/test/src/summary/prelinker_test.dart
+++ b/pkg/analyzer/test/src/summary/prelinker_test.dart
@@ -75,7 +75,8 @@ class PrelinkerTest extends SummarizeElementsTest {
     }
     UnlinkedPublicNamespace getImport(String relativeUri) {
       String absoluteUri = resolveToAbsoluteUri(library, relativeUri);
-      UnlinkedPublicNamespace namespace = sdkPublicNamespace[absoluteUri];
+      UnlinkedPublicNamespace namespace = SerializedMockSdk
+          .instance.uriToUnlinkedUnit[absoluteUri]?.publicNamespace;
       if (namespace == null) {
         namespace = uriToPublicNamespace[absoluteUri];
       }