Manual fixes for Dart^2 analyzer

pkg/analyzer_experimental/lib/src/generated/source_io.dart

 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.source.io;
 
 import 'source.dart';
 import 'dart:io';
 import 'dart:uri';
 import 'java_core.dart';
 import 'java_io.dart';
@@ skipping 177 matching lines @@
    * but may be empty string)
    * @return the file (not {@code null})
    */
   JavaFile getCanonicalFile(JavaFile packagesDirectory, String pkgName, String relPath) {
     JavaFile pkgDir = new JavaFile.relative(packagesDirectory, pkgName);
     try {
       pkgDir = pkgDir.getCanonicalFile();
     } on IOException catch (e) {
       AnalysisEngine.instance.logger.logError2("Canonical failed: ${pkgDir}", e);
     }
-    return new JavaFile.relative(pkgDir, relPath.replaceAll(0x2F, JavaFile.separatorChar));
+    return new JavaFile.relative(pkgDir, relPath.replaceAll('/', JavaFile.separatorChar));
   }
 }
 /**
  * Instances of the class {@link DirectoryBasedSourceContainer} represent a source container that
  * contains all sources within a given directory.
  * @coverage dart.engine.source
  */
 class DirectoryBasedSourceContainer implements SourceContainer {
   /**
    * Append the system file separator to the given path unless the path already ends with a
@@ skipping 69 matching lines @@
     }
     return null;
   }
   Source resolveAbsolute(ContentCache contentCache, Uri uri) {
     if (!isFileUri(uri)) {
       return null;
     }
     return new FileBasedSource.con1(contentCache, new JavaFile.fromUri(uri));
   }
 }