Use absolute URIs for LinkedDependency.uri/parts.

pkg/analyzer/lib/src/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
  * contains abstract classes which declare the interface for reading data from
  * summaries.  It is parsed and transformed into code that implements the
  * summary format.
  *
@@ skipping 578 matching lines @@
    */
   unit
 }
 
 /**
  * Information about a dependency that exists between one library and another
  * due to an "import" declaration.
  */
 abstract class LinkedDependency extends base.SummaryClass {
   /**
-   * URI for the compilation units listed in the library's `part` declarations.
-   * These URIs are relative to the importing library.
+   * Absolute URI for the compilation units listed in the library's `part`
+   * declarations, empty string for invalid URI.
    */
   @Id(1)
   List<String> get parts;
 
   /**
-   * The relative URI of the dependent library.  This URI is relative to the
-   * importing library, even if there are intervening `export` declarations.
-   * So, for example, if `a.dart` imports `b/c.dart` and `b/c.dart` exports
-   * `d/e.dart`, the URI listed for `a.dart`'s dependency on `e.dart` will be
-   * `b/d/e.dart`.
+   * The absolute URI of the dependent library, e.g. `package:foo/bar.dart`.
    */
   @Id(0)
   String get uri;
 }
 
 /**
  * Information about a single name in the export namespace of the library that
  * is not in the public namespace.
  */
 abstract class LinkedExportName extends base.SummaryClass {
@@ skipping 2577 matching lines @@
   @Id(11)
   int get visibleLength;
 
   /**
    * If a local variable, the beginning of the visible range; zero otherwise.
    */
   @informative
   @Id(12)
   int get visibleOffset;
 }