Implement fromEnvironment on bool, int and String

sdk/lib/_internal/lib/core_patch.dart

Index: sdk/lib/_internal/lib/core_patch.dart
diff --git a/sdk/lib/_internal/lib/core_patch.dart b/sdk/lib/_internal/lib/core_patch.dart
index cb844e0410fa7469d2a2f24e8b1a0ccdbcfc8840..8e5bec02c81cd96fb813f3328a2c64e52a228ba1 100644
--- a/sdk/lib/_internal/lib/core_patch.dart
+++ b/sdk/lib/_internal/lib/core_patch.dart
@@ -102,6 +102,11 @@ patch class int {
                            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 {
@@ -219,6 +224,18 @@ patch class String {
     }
     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 {