Remove frog from the repository.

frog/file_system_dom.dart

-// Copyright (c) 2011, 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('file_system_dom');
-
-#import('dart:dom_deprecated');
-#import('file_system.dart');
-
-/**
- * [FileSystem] implementation using XHRs for reading files and an in memory
- * cache for writing them.
- */
-class DomFileSystem implements FileSystem {
-  Map<String, String> _fileCache;
-  String _path;
-
-  DomFileSystem([this._path = null]) : _fileCache = {};
-
-  // TODO(vsm): Move this to FileSystem.
-  String absPath(String filename) {
-    if (_path != null && !filename.startsWith('/')
-        && !filename.startsWith('file:///') && !filename.startsWith('http://')
-        && !filename.startsWith('dart:')) {
-      filename = joinPaths(_path, filename);
-    }
-    return filename;
-  }
-
-  String readAll(String filename) {
-    filename = absPath(filename);
-    var result = _fileCache[filename];
-    if (result == null) {
-      final xhr = new XMLHttpRequest();
-      // TODO(jimhug): Fix API so we can get multiple files at once.
-      // Use a sychronous XHR to match the current API.
-      xhr.open('GET', filename, false);
-      try {
-        xhr.send(null);
-      } catch (var e) {
-        // TODO(vsm): This XHR appears to fail if the URL is a
-        // directory.  Return something to make fileExists work.
-        // Handle this better.
-        return "_directory($filename)_";
-      }
-
-      if (xhr.status == 0 || xhr.status == 200) {
-        result = xhr.responseText;
-        if (result.isEmpty()) {
-          // TODO(vsm): Figure out why a non-existent file is not giving
-          // an error code.
-          print('Error: $filename is not found or empty');
-          return null;
-        }
-      } else {
-        // TODO(jimhug): Better error handling.
-        print("Error: ${xhr.statusText}");
-      }
-      _fileCache[filename] = result;
-    }
-    return result;
-  }
-
-  void writeString(String outfile, String text) {
-    outfile = absPath(outfile);
-    _fileCache[outfile] = text;
-  }
-
-  // Note: this is not a perf nightmare only because of caching.
-  bool fileExists(String filename) => readAll(filename) != null;
-
-  void createDirectory(String path, [bool recursive = false]) {
-    // TODO(rnystrom): Implement.
-    throw 'createDirectory() is not implemented by DomFileSystem yet.';
-  }
-
-  void removeDirectory(String path, [bool recursive = false]) {
-    // TODO(rnystrom): Implement.
-    throw 'removeDirectory() is not implemented by DomFileSystem yet.';
-  }
-}