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

pkg/analyzer/test/src/context/mock_sdk.dart

 // Copyright (c) 2014, 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.
 
 library analyzer.test.src.context.mock_sdk;
 
+import 'package:analyzer/dart/element/element.dart' show LibraryElement;
 import 'package:analyzer/file_system/file_system.dart' as resource;
 import 'package:analyzer/file_system/memory_file_system.dart' as resource;
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/context/context.dart';
 import 'package:analyzer/src/generated/engine.dart' show AnalysisEngine;
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/summary/idl.dart' show PackageBundle;
+import 'package:analyzer/src/summary/summarize_elements.dart'
+    show PackageBundleAssembler;
 
 const String librariesContent = r'''
 const Map<String, LibraryInfo> libraries = const {
   "async": const LibraryInfo("async/async.dart"),
   "collection": const LibraryInfo("collection/collection.dart"),
   "convert": const LibraryInfo("convert/convert.dart"),
   "core": const LibraryInfo("core/core.dart"),
   "html": const LibraryInfo("html/dartium/html_dartium.dart"),
   "math": const LibraryInfo("math/math.dart"),
   "_foreign_helper": const LibraryInfo("_internal/js_runtime/lib/foreign_helper.dart"),
@@ skipping 300 matching lines @@
   final Map<String, String> uriMap;
 
   /**
    * The [AnalysisContextImpl] which is used for all of the sources.
    */
   AnalysisContextImpl _analysisContext;
 
   @override
   final List<SdkLibrary> sdkLibraries;
 
+  /**
+   * The cached linked bundle of the SDK.
+   */
+  PackageBundle _bundle;
+
   MockSdk({bool dartAsync: true, resource.ResourceProvider resourceProvider})
       : provider = resourceProvider ?? new resource.MemoryResourceProvider(),
         sdkLibraries = dartAsync ? _LIBRARIES : [_LIB_CORE],
         uriMap = dartAsync ? FULL_URI_MAP : NO_ASYNC_URI_MAP {
     for (_MockSdkLibrary library in sdkLibraries) {
       provider.newFile(library.path, library.content);
       library.parts.forEach((String path, String content) {
         provider.newFile(path, content);
       });
     }
@@ skipping 45 matching lines @@
           return file.createSource(dartUri);
         } catch (exception) {
           return null;
         }
       }
     }
     return null;
   }
 
   @override
+  PackageBundle getLinkedBundle() {
+    if (_bundle == null) {
+      PackageBundleAssembler assembler = new PackageBundleAssembler();
+      for (SdkLibrary sdkLibrary in sdkLibraries) {
+        String uriStr = sdkLibrary.shortName;
+        Source source = mapDartUri(uriStr);
+        LibraryElement libraryElement = context.computeLibraryElement(source);
+        assembler.serializeLibraryElement(libraryElement);
+      }
+      List<int> bytes = assembler.assemble().toBuffer();
+      _bundle = new PackageBundle.fromBuffer(bytes);
+    }
+    return _bundle;
+  }
+
+  @override
   SdkLibrary getSdkLibrary(String dartUri) {
     // getSdkLibrary() is only used to determine whether a library is internal
     // to the SDK.  The mock SDK doesn't have any internals, so it's safe to
     // return null.
     return null;
   }
 
   @override
   Source mapDartUri(String dartUri) {
     String path = uriMap[dartUri];
@@ skipping 50 matching lines @@
 
   @override
   AnalysisCache createCacheFromSourceFactory(SourceFactory factory) {
     if (factory == null) {
       return super.createCacheFromSourceFactory(factory);
     }
     return new AnalysisCache(
         <CachePartition>[AnalysisEngine.instance.partitionManager.forSdk(sdk)]);
   }
 }