Add file hashes to SdkBundle; rename to PackageBundle.

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 223d66afef0ee4568672daded774e9ef14a69a1c..ad422cafca68cc8fa486eaf6e260ba904f514629 100644
--- a/pkg/analyzer/lib/src/summary/summary_sdk.dart
+++ b/pkg/analyzer/lib/src/summary/summary_sdk.dart
@@ -24,7 +24,7 @@ import 'package:analyzer/task/model.dart'
 
 class SdkSummaryResultProvider implements SummaryResultProvider {
   final InternalAnalysisContext context;
-  final SdkBundle bundle;
+  final PackageBundle bundle;
   final SummaryTypeProvider typeProvider = new SummaryTypeProvider();
 
   @override
@@ -135,7 +135,7 @@ class SdkSummaryResultProvider implements SummaryResultProvider {
  * The implementation of [SummaryResynthesizer] for Dart SDK.
  */
 class SdkSummaryResynthesizer extends SummaryResynthesizer {
-  final SdkBundle bundle;
+  final PackageBundle bundle;
   final Map<String, UnlinkedUnit> unlinkedSummaries = <String, UnlinkedUnit>{};
   final Map<String, LinkedLibrary> linkedSummaries = <String, LinkedLibrary>{};