Fix newly introduced errors and warnings

pkg/analyzer/lib/src/summary/summary_sdk.dart

Index: pkg/analyzer/lib/src/summary/summary_sdk.dart
diff --git a/pkg/analyzer/lib/src/summary/summary_sdk.dart b/pkg/analyzer/lib/src/summary/summary_sdk.dart
index 8d13a552cb25610959967716ffcf4b42a0a61864..5857d8b6280a8b6e4d0d07cff9d30e710a624011 100644
--- a/pkg/analyzer/lib/src/summary/summary_sdk.dart
+++ b/pkg/analyzer/lib/src/summary/summary_sdk.dart
@@ -39,7 +39,8 @@ class SdkSummaryResultProvider extends ResynthesizerResultProvider {
   @override
   bool compute(CacheEntry entry, ResultDescriptor result) {
     if (result == TYPE_PROVIDER) {
-      entry.setValue(result, typeProvider, TargetedResult.EMPTY_LIST);
+      entry.setValue(result as ResultDescriptor<TypeProvider>, typeProvider,
+          TargetedResult.EMPTY_LIST);
       return true;
     }
     return super.compute(entry, result);