Add '--dart-sdk-summary' option to analyzer-cli and use SummaryBasedDartSdk.

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

 import 'dart:io' as io;
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/context/context.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_io.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/source.dart';
@@ skipping 116 matching lines @@
         return true;
       }
     }
     return false;
   }
 }
 
 /**
  * The [UriResolver] that knows about sources that are served from their
  * summaries.
+ *
+ * TODO(scheglov) rename to `InSummaryUriResolver` - it's not `package:` specific.
  */
 class InSummaryPackageUriResolver extends UriResolver {
   final SummaryDataStore _dataStore;
 
   InSummaryPackageUriResolver(this._dataStore);
 
   @override
   Source resolveAbsolute(Uri uri, [Uri actualUri]) {
     actualUri ??= uri;
     String uriString = uri.toString();
@@ skipping 32 matching lines @@
   @override
   String get encoding => uri.toString();
 
   @override
   String get fullName => encoding;
 
   @override
   int get hashCode => uri.hashCode;
 
   @override
-  bool get isInSystemLibrary => false;
+  bool get isInSystemLibrary => uri.scheme == DartUriResolver.DART_SCHEME;
 
   @override
   int get modificationStamp => 0;
 
   @override
   String get shortName => pathos.basename(fullName);
 
   @override
   UriKind get uriKind => UriKind.PACKAGE_URI;
 
   @override
   bool operator ==(Object object) =>
       object is InSummarySource && object.uri == uri;
 
   @override
   bool exists() => true;
 
   @override
   String toString() => uri.toString();
 }
 
 /**
  * A [SummaryDataStore] is a container for the data extracted from a set of
  * summary package bundles.  It contains maps which can be used to find linked
  * and unlinked summaries by URI.
  */
 class SummaryDataStore {
   /**
+   * List of all [PackageBundle]s.
+   */
+  final List<PackageBundle> bundles = <PackageBundle>[];
+
+  /**
    * Map from the URI of a compilation unit to the unlinked summary of that
    * compilation unit.
    */
   final Map<String, UnlinkedUnit> unlinkedMap = <String, UnlinkedUnit>{};
 
   /**
    * Map from the URI of a library to the linked summary of that library.
    */
   final Map<String, LinkedLibrary> linkedMap = <String, LinkedLibrary>{};
 
   /**
    * Map from the URI of a library to the summary path that contained it.
    */
   final Map<String, String> uriToSummaryPath = <String, String>{};
 
   SummaryDataStore(Iterable<String> summaryPaths) {
     summaryPaths.forEach(_fillMaps);
   }
 
   /**
    * Add the given [bundle] loaded from the file with the given [path].
    */
   void addBundle(String path, PackageBundle bundle) {
+    bundles.add(bundle);
     for (int i = 0; i < bundle.unlinkedUnitUris.length; i++) {
       String uri = bundle.unlinkedUnitUris[i];
       uriToSummaryPath[uri] = path;
       unlinkedMap[uri] = bundle.unlinkedUnits[i];
     }
     for (int i = 0; i < bundle.linkedLibraryUris.length; i++) {
       String uri = bundle.linkedLibraryUris[i];
       linkedMap[uri] = bundle.linkedLibraries[i];
     }
   }
@@ skipping 44 matching lines @@
  * also provides [summaryPath].
  */
 class _InSummaryFallbackSource extends FileBasedSource
     implements InSummarySource {
   @override
   final String summaryPath;
 
   _InSummaryFallbackSource(JavaFile file, Uri uri, this.summaryPath)
       : super(file, uri);
 }