Handle double literals in constant constructors.

pkg/compiler/lib/src/constants/constant_constructors.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.
 
 // TODO(johnniwinther): Remove this library when all constant constructors are
 // computed during resolution.
 library dart2js.constants.constant_constructors;
 
 import '../common.dart';
 import '../dart_types.dart';
@@ skipping 267 matching lines @@
   ConstantExpression visitTopLevelFieldGet(Send node, FieldElement field, _) {
     return new VariableConstantExpression(field);
   }
 
   @override
   ConstantExpression visitLiteralInt(LiteralInt node) {
     return new IntConstantExpression(node.value);
   }
 
   @override
+  ConstantExpression visitLiteralDouble(LiteralDouble node) {
+    return new DoubleConstantExpression(node.value);
+  }
+
+  @override
   ConstantExpression visitLiteralBool(LiteralBool node) {
     return new BoolConstantExpression(node.value);
   }
 
   @override
   ConstantExpression visitLiteralNull(LiteralNull node) {
     return new NullConstantExpression();
   }
 
   @override
@@ skipping 25 matching lines @@
     }
     return new IdenticalConstantExpression(
         apply(arguments.nodes.head), apply(arguments.nodes.tail.head));
   }
 
   @override
   ConstantExpression visitNamedArgument(NamedArgument node) {
     return apply(node.expression);
   }
 }