Implement fromEnvironment on bool, int, String in dart2js.

sdk/lib/_internal/lib/core_patch.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.
 
 // Patch file for dart:core classes.
 import "dart:_collection-dev" as _symbol_dev;
 import 'dart:_interceptors';
 import 'dart:_js_helper' show checkNull,
                               getRuntimeType,
                               JSSyntaxRegExp,
@@ skipping 84 matching lines @@
   static const String _EXPANDO_PROPERTY_NAME = 'expando\$values';
   static int _keyCount = 0;
 }
 
 patch class int {
   patch static int parse(String source,
                          { int radix,
                            int onError(String source) }) {
     return Primitives.parseInt(source, radix, onError);
   }
+
+  patch factory int.fromEnvironment(String name, {int defaultValue}) {
+    throw new UnsupportedError(
+        'int.fromEnvironement can only be used as a const constructor');
+  }
 }
 
 patch class double {
   patch static double parse(String source,
                             [double onError(String source)]) {
     return Primitives.parseDouble(source, onError);
   }
 }
 
 patch class Error {
@@ skipping 97 matching lines @@
 }
 
 
 patch class String {
   patch factory String.fromCharCodes(Iterable<int> charCodes) {
     if (charCodes is! JSArray) {
       charCodes = new List.from(charCodes);
     }
     return Primitives.stringFromCharCodes(charCodes);
   }
+
+  patch factory String.fromEnvironment(String name, {String defaultValue}) {
+    throw new UnsupportedError(
+        'String.fromEnvironement can only be used as a const constructor');
+  }
+}
+
+patch class bool {
+  patch factory bool.fromEnvironment(String name, {bool defaultValue}) {
+    throw new UnsupportedError(
+        'bool.fromEnvironement can only be used as a const constructor');
+  }
 }
 
 patch class RegExp {
   patch factory RegExp(String source,
                        {bool multiLine: false,
                         bool caseSensitive: true})
     => new JSSyntaxRegExp(source,
                           multiLine: multiLine,
                           caseSensitive: caseSensitive);
 }
@@ skipping 80 matching lines @@
 
 patch class Uri {
   patch static bool get _isWindows => false;
 
   patch static Uri get base {
     String uri = Primitives.currentUri();
     if (uri != null) return Uri.parse(uri);
     throw new UnsupportedError("'Uri.base' is not supported");
   }
 }