Clean up package imports and library names

pkg/analyzer/lib/src/generated/java_engine_io.dart

-library java.engine.io;
+// 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.java_engine_io;
 
 import "dart:io";
-import "java_io.dart";
 
-class OSUtilities {
-  static String LINE_SEPARATOR = isWindows() ? '\r\n' : '\n';
-  static bool isWindows() => Platform.operatingSystem == 'windows';
-  static bool isMac() => Platform.operatingSystem == 'macos';
-}
+import "package:analyzer/src/generated/java_io.dart";
 
 class FileUtilities2 {
   static JavaFile createFile(String path) {
     return new JavaFile(path).getAbsoluteFile();
   }
 }
+
+class OSUtilities {
+  static String LINE_SEPARATOR = isWindows() ? '\r\n' : '\n';
+  static bool isMac() => Platform.operatingSystem == 'macos';
+  static bool isWindows() => Platform.operatingSystem == 'windows';
+}