Handle use of fromEnvironment from serialized data.

pkg/compiler/lib/src/elements/common.dart

 // Copyright (c) 2015, 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.
 
 /// Mixins that implement convenience methods on [Element] subclasses.
 
 library elements.common;
 
-import '../common/names.dart' show Names, Uris;
+import '../common/names.dart' show Identifiers, Names, Uris;
 import '../core_types.dart' show CoreClasses;
 import '../dart_types.dart' show DartType, InterfaceType, FunctionType;
 import '../util/util.dart' show Link;
 
 import 'elements.dart';
 
 abstract class ElementCommon implements Element {
   @override
   bool get isLibrary => kind == ElementKind.LIBRARY;
 
@@ skipping 580 matching lines @@
   bool get isInstanceMember {
     return isClassMember && !isStatic;
   }
 
   @override
   bool get isAbstract {
     return getter != null && getter.isAbstract ||
         setter != null && setter.isAbstract;
   }
 }
+
+abstract class ConstructorElementCommon implements ConstructorElement {
+  @override
+  bool get isFromEnvironmentConstructor {
+    return name == Identifiers.fromEnvironment &&

[Siggi Cherem (dart-lang), 2016/06/03 17:57:03]

would it be worth caching the results of this?

[Johnni Winther, 2016/06/13 07:49:20]

Made a CL for it.

+        library.isDartCore &&
+        (enclosingClass.name == 'bool' ||
+            enclosingClass.name == 'int' ||
+            enclosingClass.name == 'String');
+  }
+
+  @override
+  bool get isIntFromEnvironmentConstructor {
+    return name == Identifiers.fromEnvironment &&
+        library.isDartCore &&
+        enclosingClass.name == 'int';
+  }
+
+  @override
+  bool get isBoolFromEnvironmentConstructor {
+    return name == Identifiers.fromEnvironment &&
+        library.isDartCore &&
+        enclosingClass.name == 'bool';
+  }
+
+  @override
+  bool get isStringFromEnvironmentConstructor {
+    return name == Identifiers.fromEnvironment &&
+        library.isDartCore &&
+        enclosingClass.name == 'String';
+  }
+}