Reapply "Rename mappedBy to map."

sdk/lib/_internal/compiler/implementation/dart2js.dart

 // Copyright (c) 2012, 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 dart2js;
 
 import 'dart:async';
 import 'dart:collection' show Queue, LinkedHashMap;
 import 'dart:io';
 import 'dart:uri';
@@ skipping 113 matching lines @@
   }
 
   setAnalyzeOnly(String argument) {
     analyzeOnly = true;
     passThrough(argument);
   }
 
   setCategories(String argument) {
     List<String> categories = extractParameter(argument).split(',');
     Set<String> allowedCategories =
-        LIBRARIES.values.mappedBy((x) => x.category).toSet();
+        LIBRARIES.values.map((x) => x.category).toSet();
     allowedCategories.remove('Shared');
     allowedCategories.remove('Internal');
     List<String> allowedCategoriesList =
         new List<String>.from(allowedCategories);
     allowedCategoriesList.sort();
     if (categories.contains('all')) {
       categories = allowedCategoriesList;
     } else {
       String allowedCategoriesString =
           Strings.join(allowedCategoriesList, ', ');
@@ skipping 342 matching lines @@
     } catch (ignored) {
       print('Internal error: error while printing exception');
     }
     try {
       print(trace);
     } finally {
       exit(253); // 253 is recognized as a crash by our test scripts.
     }
   }
 }