Set empty namespaces for public/exportNamespace of synthetic libraries.

pkg/analysis_server/lib/src/services/completion/dart/completion_manager.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 services.completion.dart.manager;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/provisional/completion/completion_core.dart'
     show CompletionContributor, CompletionRequest;
 import 'package:analysis_server/src/provisional/completion/dart/completion_dart.dart';
 import 'package:analysis_server/src/provisional/completion/dart/completion_plugin.dart';
 import 'package:analysis_server/src/provisional/completion/dart/completion_target.dart';
 import 'package:analysis_server/src/services/completion/completion_core.dart';
 import 'package:analysis_server/src/services/completion/completion_performance.dart';
 import 'package:analysis_server/src/services/completion/dart/common_usage_sorter.dart';
 import 'package:analysis_server/src/services/completion/dart/contribution_sorter.dart';
 import 'package:analysis_server/src/services/completion/dart/optype.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/dart/ast/ast.dart';
+import 'package:analyzer/dart/ast/standard_ast_factory.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
-import 'package:analyzer/dart/ast/standard_ast_factory.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/exception/exception.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/context/context.dart' show AnalysisFutureHelper;
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/ast/token.dart';
 import 'package:analyzer/src/generated/engine.dart' hide AnalysisResult;
 import 'package:analyzer/src/generated/source.dart';
@@ skipping 267 matching lines @@
   @override
   Future<List<ImportElement>> resolveImports() async {
     checkAborted();
     if (_resolvedImports != null) {
       return _resolvedImports;
     }
     LibraryElement libElem = libraryElement;
     if (libElem == null) {
       return null;
     }
-    _resolvedImports = <ImportElement>[];
-    for (ImportElement importElem in libElem.imports) {
-      if (importElem.importedLibrary?.exportNamespace == null) {
-        await _computeAsync(this, importElem.importedLibrary.source,
-            LIBRARY_ELEMENT4, performance, 'resolve imported library');
-        checkAborted();
+    if (result != null) {
+      _resolvedImports = libElem.imports;
+    } else {
+      _resolvedImports = <ImportElement>[];
+      for (ImportElement importElem in libElem.imports) {
+        if (importElem.importedLibrary?.exportNamespace == null) {
+          await _computeAsync(this, importElem.importedLibrary.source,
+              LIBRARY_ELEMENT4, performance, 'resolve imported library');
+          checkAborted();
+        }
+        _resolvedImports.add(importElem);
       }
-      _resolvedImports.add(importElem);
     }
     return _resolvedImports;
   }
 
   @override
   Future<List<CompilationUnitElement>> resolveUnits() async {
     checkAborted();
     if (_resolvedUnits != null) {
       return _resolvedUnits;
     }
@@ skipping 204 matching lines @@
           if (start <= requestOffset && requestOffset <= end) {
             // Replacement range for import URI
             return new ReplacementRange(start, end - start);
           }
         }
       }
     }
     return new ReplacementRange(requestOffset, 0);
   }
 }