Add DartSdk.getLinkedBundle() and use it in PubSummaryManager.

pkg/analyzer/lib/source/embedder.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 @deprecated
 library analyzer.source.embedder;
 
 import 'dart:collection' show HashMap;
 import 'dart:core' hide Resource;
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/source/package_map_provider.dart'
     show PackageMapProvider;
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/java_io.dart' show JavaFile;
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/sdk_io.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart' show FileBasedSource;
-import 'package:analyzer/src/summary/idl.dart';
+import 'package:analyzer/src/summary/idl.dart' show PackageBundle;
 import 'package:yaml/yaml.dart';
 
 export 'package:analyzer/src/context/builder.dart' show EmbedderYamlLocator;
 
 const String _DART_COLON_PREFIX = 'dart:';
 const String _EMBEDDED_LIB_MAP_KEY = 'embedded_libs';
 
 /// Check if this map defines embedded libraries.
 @deprecated
 bool definesEmbeddedLibs(Map map) => map[_EMBEDDED_LIB_MAP_KEY] != null;
 
 /// An SDK backed by URI mappings derived from an `_embedder.yaml` file.
 @deprecated
 class EmbedderSdk extends AbstractDartSdk {
   final Map<String, String> _urlMappings = new HashMap<String, String>();
 
   EmbedderSdk([Map<Folder, YamlMap> embedderYamls]) {
     embedderYamls?.forEach(_processEmbedderYaml);
   }
 
   // TODO(danrubel) Determine SDK version
   @override
   String get sdkVersion => '0';
 
   /// The url mappings for this SDK.
   Map<String, String> get urlMappings => _urlMappings;
 
   @override
+  PackageBundle getLinkedBundle() => null;
+
+  @override
   String getRelativePathFromFile(JavaFile file) => file.getAbsolutePath();
 
   @override
   PackageBundle getSummarySdkBundle(bool strongMode) => null;
 
   @override
   FileBasedSource internalMapDartUri(String dartUri) {
     String libraryName;
     String relativePath;
     int index = dartUri.indexOf('/');
@@ skipping 114 matching lines @@
   @override
   Uri restoreAbsolute(Source source) {
     String path = source.fullName;
     if (path.length > 3 && path[1] == ':' && path[2] == '\\') {
       path = '/${path[0]}:${path.substring(2).replaceAll('\\', '/')}';
     }
     Source sdkSource = dartSdk.fromFileUri(Uri.parse('file://$path'));
     return sdkSource?.uri;
   }
 }