Change SdkBundle to better fit its usage by SummaryResynthesizer.

pkg/analyzer/tool/summary/idl.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.
 
 /**
  * This file is an "idl" style description of the summary format.  It is not
  * executed directly; instead it is parsed and transformed into code that
  * implements the summary format.
  *
  * The code generation process introduces the following non-typical semantics:
@@ skipping 162 matching lines @@
    */
   List<PrelinkedReference> references;
 }
 
 /**
  * Information about SDK.
  */
 @topLevel
 class SdkBundle {
   /**
-   * Information for the libraries units constituting the SDK.
+   * The list of URIs of items in [prelinkedLibraries], e.g. `dart:core`.
    */
-  List<SdkBundleLibrary> libraries;
-}
-
-/**
- * Information about a single library in SDK.
- */
-class SdkBundleLibrary {
-  /**
-   * The URI of the library, including `dart:`, e.g. `dart:core`.
-   */
-  String uri;
+  List<String> prelinkedLibraryUris;
 
   /**
-   * Pre-linked information the library.
+   * Pre-linked libraries.
    */
-  PrelinkedLibrary prelinked;
+  List<PrelinkedLibrary> prelinkedLibraries;
 
   /**
-   * Unlinked information for the compilation units constituting the library.
-   * The zeroth entry in the list is the defining compilation unit; the
-   * remaining entries are the parts, in the order listed in the defining
-   * compilation unit's part declarations.
+   * The list of URIs of items in [unlinkedUnits], e.g. `dart:core/bool.dart`.
+   */
+  List<String> unlinkedUnitUris;
+
+  /**
+   * Unlinked information for the compilation units constituting the SDK.
    */
   List<UnlinkedUnit> unlinkedUnits;
 }
 
 /**
  * Unlinked summary information about a class declaration.
  */
 class UnlinkedClass {
   /**
    * Name of the class.
@@ skipping 527 matching lines @@
   /**
    * Indicates whether the variable is declared using the `const` keyword.
    */
   bool isConst;
 
   /**
    * Indicates whether this variable lacks an explicit type declaration.
    */
   bool hasImplicitType;
 }