pkg/path: Add type annotations to top-level and static fields.

lib/src/style.dart

 // Copyright (c) 2013, 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 path.style;
 
 import 'context.dart';
 import 'style/posix.dart';
 import 'style/url.dart';
 import 'style/windows.dart';
 
 /// An enum type describing a "flavor" of path.
 abstract class Style {
   /// POSIX-style paths use "/" (forward slash) as separators. Absolute paths
   /// start with "/". Used by UNIX, Linux, Mac OS X, and others.
-  static final posix = new PosixStyle();
+  static final Style posix = new PosixStyle();
 
   /// Windows paths use "\" (backslash) as separators. Absolute paths start with
   /// a drive letter followed by a colon (example, "C:") or two backslashes
   /// ("\\") for UNC paths.
   // TODO(rnystrom): The UNC root prefix should include the drive name too, not
   // just the "\\".
-  static final windows = new WindowsStyle();
+  static final Style windows = new WindowsStyle();
 
   /// URLs aren't filesystem paths, but they're supported to make it easier to
   /// manipulate URL paths in the browser.
   ///
   /// URLs use "/" (forward slash) as separators. Absolute paths either start
   /// with a protocol and optional hostname (e.g. `http://dartlang.org`,
   /// `file://`) or with "/".
-  static final url = new UrlStyle();
+  static final Style url = new UrlStyle();
 
   /// The style of the host platform.
   ///
   /// When running on the command line, this will be [windows] or [posix] based
   /// on the host operating system. On a browser, this will be [url].
-  static final platform = _getPlatformStyle();
+  static final Style platform = _getPlatformStyle();
 
   /// Gets the type of the host platform.
   static Style _getPlatformStyle() {
     // If we're running a Dart file in the browser from a `file:` URI,
     // [Uri.base] will point to a file. If we're running on the standalone,
     // it will point to a directory. We can use that fact to determine which
     // style to use.
     if (Uri.base.scheme != 'file') return Style.url;
     if (!Uri.base.path.endsWith('/')) return Style.url;
     if (new Uri(path: 'a/b').toFilePath() == 'a\\b') return Style.windows;
@@ skipping 31 matching lines @@
   String pathFromUri(Uri uri);
 
   @Deprecated("Most style members will be removed in path 2.0.")
   Uri relativePathToUri(String path);
 
   @Deprecated("Most style members will be removed in path 2.0.")
   Uri absolutePathToUri(String path);
 
   String toString() => name;
 }