Consolidate duplicate code for resloving URIs.

pkg/analyzer/lib/src/generated/source.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.src.generated.source;
 
 import 'dart:collection';
 import "dart:math" as math;
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 386 matching lines @@
   @override
   bool operator ==(Object other) {
     if (other is NonExistingSource) {
       return other.uriKind == uriKind && other.fullName == fullName;
     }
     return false;
   }
 
   @override
   bool exists() => false;
-
-  @override
-  Uri resolveRelativeUri(Uri relativeUri) {
-    throw new UnsupportedOperationException('$fullName does not exist.');
-  }
 }
 
 /**
  * The interface `Source` defines the behavior of objects representing source code that can be
  * analyzed by the analysis engine.
  *
  * Implementations of this interface need to be aware of some assumptions made by the analysis
  * engine concerning sources:
  * * Sources are not required to be unique. That is, there can be multiple instances representing
  * the same source.
@@ skipping 118 matching lines @@
   /**
    * Return `true` if this source exists.
    *
    * Clients should consider using the the method [AnalysisContext.exists] because
    * contexts can have local overrides of the content of a source that the source is not aware of
    * and a source with local content is considered to exist even if there is no file on disk.
    *
    * @return `true` if this source exists
    */
   bool exists();
-
-  /**
-   * Resolve the relative URI against the URI associated with this source object.
-   *
-   * Note: This method is not intended for public use, it is only visible out of necessity. It is
-   * only intended to be invoked by a [SourceFactory]. Source factories will
-   * only invoke this method if the URI is relative, so implementations of this method are not
-   * required to, and generally do not, verify the argument. The result of invoking this method with
-   * an absolute URI is intentionally left unspecified.
-   *
-   * @param relativeUri the relative URI to be resolved against this source
-   * @return the URI to which given URI was resolved
-   * @throws AnalysisException if the relative URI could not be resolved
-   */
-  Uri resolveRelativeUri(Uri relativeUri);
 }
 
 /**
  * The interface `ContentReceiver` defines the behavior of objects that can receive the
  * content of a source.
  */
 abstract class Source_ContentReceiver {
   /**
    * Accept the contents of a source.
    *
@@ skipping 357 matching lines @@
   Source resolveAbsolute(Uri uri, [Uri actualUri]);
 
   /**
    * Return an absolute URI that represents the given [source], or `null` if a
    * valid URI cannot be computed.
    *
    * The computation should be based solely on [source.fullName].
    */
   Uri restoreAbsolute(Source source) => null;
 }