Remove ConstantExpression.value

pkg/compiler/lib/src/js_backend/codegen/unsugar.dart

Index: pkg/compiler/lib/src/js_backend/codegen/unsugar.dart
diff --git a/pkg/compiler/lib/src/js_backend/codegen/unsugar.dart b/pkg/compiler/lib/src/js_backend/codegen/unsugar.dart
index 9ce842f43367a700f4852b0efe9bd4cfa300a1fe..045e7664a039764ab37e32a628d66fd21b20b9d9 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/unsugar.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/unsugar.dart
@@ -83,22 +83,20 @@ class UnsugarVisitor extends RecursiveVisitor {
 
   Constant get trueConstant {
     return new Constant(
-        new BoolConstantExpression(
-            true,
-            new TrueConstantValue()));
+        new BoolConstantExpression(true),
+        new TrueConstantValue());
   }
 
   Constant get falseConstant {
     return new Constant(
-        new BoolConstantExpression(
-            false,
-            new FalseConstantValue()));
+        new BoolConstantExpression(false),
+        new FalseConstantValue());
   }
 
   Constant get nullConstant {
     return new Constant(
-        new NullConstantExpression(
-            new NullConstantValue()));
+        new NullConstantExpression(),
+        new NullConstantValue());
   }
 
   void insertLetPrim(Primitive primitive, Expression node) {