Use configurations and declared variables to select import/export URIs during prelinking.

pkg/analyzer_cli/lib/src/build_mode.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.
 
 library analyzer_cli.src.build_mode;
 
 import 'dart:core';
 import 'dart:io' as io;
 
 import 'package:analyzer/dart/ast/ast.dart' show CompilationUnit;
@@ skipping 377 matching lines @@
         return null;
       }
       return uriToUnit.putIfAbsent(uri, () {
         CompilationUnit unit = context.computeResult(source, PARSED_UNIT);
         UnlinkedUnitBuilder unlinkedUnit = serializeAstUnlinked(unit);
         assembler.addUnlinkedUnit(source, unlinkedUnit);
         return unlinkedUnit;
       });
     }
 
-    Map<String, LinkedLibraryBuilder> linkResult =
-        link(sourceUris, _getDependency, _getUnit, options.strongMode);
+    Map<String, LinkedLibraryBuilder> linkResult = link(
+        sourceUris,
+        _getDependency,
+        _getUnit,
+        context.declaredVariables.get,
+        options.strongMode);
     linkResult.forEach(assembler.addLinkedLibrary);
   }
 }
 
 /**
  * Instances of the class [ExplicitSourceResolver] map URIs to files on disk
  * using a fixed mapping provided at construction time.
  */
 class ExplicitSourceResolver extends UriResolver {
   final Map<Uri, File> uriToFileMap;
@@ skipping 27 matching lines @@
    * Build the inverse mapping of [uriToSourceMap].
    */
   static Map<String, Uri> _computePathToUriMap(Map<Uri, File> uriToSourceMap) {
     Map<String, Uri> pathToUriMap = <String, Uri>{};
     uriToSourceMap.forEach((Uri uri, File file) {
       pathToUriMap[file.path] = uri;
     });
     return pathToUriMap;
   }
 }