Handle use of fromEnvironment from serialized data.

pkg/compiler/lib/src/serialization/modelz.dart

Index: pkg/compiler/lib/src/serialization/modelz.dart
diff --git a/pkg/compiler/lib/src/serialization/modelz.dart b/pkg/compiler/lib/src/serialization/modelz.dart
index 1d220ff54a8b5db26d5761b8209033724691db2e..87f5fbceea5a8f8b7dcc1560eb4420f003181e21 100644
--- a/pkg/compiler/lib/src/serialization/modelz.dart
+++ b/pkg/compiler/lib/src/serialization/modelz.dart
@@ -1157,7 +1157,8 @@ abstract class ConstructorElementZ extends DeserializedElementZ
         FunctionTypedElementMixin,
         ParametersMixin,
         TypedElementMixin,
-        MemberElementMixin
+        MemberElementMixin,
+        ConstructorElementCommon
     implements
         ConstructorElement,
         // TODO(johnniwinther): Sort out whether a constructor is a method.
@@ -1177,14 +1178,6 @@ abstract class ConstructorElementZ extends DeserializedElementZ
   @override
   bool get isExternal => _decoder.getBool(Key.IS_EXTERNAL);
 
-  bool get isFromEnvironmentConstructor {
-    return name == 'fromEnvironment' &&
-        library.isDartCore &&
-        (enclosingClass.name == 'bool' ||
-            enclosingClass.name == 'int' ||
-            enclosingClass.name == 'String');
-  }
-
   ConstantConstructor get constantConstructor {
     if (isConst && _constantConstructor == null) {
       ObjectDecoder data =
@@ -1413,6 +1406,15 @@ class ForwardingConstructorElementZ extends ElementZ
   bool get isFromEnvironmentConstructor => false;
 
   @override
+  bool get isIntFromEnvironmentConstructor => false;
+
+  @override
+  bool get isBoolFromEnvironmentConstructor => false;
+
+  @override
+  bool get isStringFromEnvironmentConstructor => false;
+
+  @override
   bool get isRedirectingFactory => false;
 
   @override