Allow getters to return Intl messages

pkg/intl/test/message_extraction/sample_with_messages.dart

 // Copyright (c) 2013, 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.
 
 /**
  * This is a program with various [Intl.message] messages. It just prints
  * all of them, and is used for testing of message extraction, translation,
  * and code generation.
  */
 library sample;
@@ skipping 29 matching lines @@
 alwaysTranslated() =>
     Intl.message("This string is always translated", locale: 'fr',
         name: 'alwaysTranslated');
 
 // Test interpolation with curly braces around the expression, but it must
 // still be just a variable reference.
 trickyInterpolation(s) =>
     Intl.message("Interpolation is tricky when it ends a sentence like ${s}.",
         name: 'trickyInterpolation', args: [s]);
 
-leadingQuotes() => Intl.message("\"So-called\"", name: 'leadingQuotes');
+get leadingQuotes => Intl.message("\"So-called\"", name: 'leadingQuotes');
 
 // A message with characters not in the basic multilingual plane.
 originalNotInBMP() => Intl.message("Ancient Greek hangman characters: 𐅆𐅇.",
     name: "originalNotInBMP");
 
 // A string for which we don't provide all translations.
 notAlwaysTranslated() => Intl.message("This is missing some translations",
     name: "notAlwaysTranslated");
 
 // This is invalid and should be recognized as such, because the message has
@@ skipping 67 matching lines @@
   var messageVariable = message3;
 
   printOut("-------------------------------------------");
   printOut("Printing messages for ${locale.locale}");
   Intl.withLocale(locale.locale, () {
     printOut(message1());
     printOut(message2("hello"));
     printOut(messageVariable(1,2,3));
     printOut(multiLine());
     printOut(types(1, "b", ["c", "d"]));
-    printOut(leadingQuotes());
+    printOut(leadingQuotes);
     printOut(alwaysTranslated());
     printOut(trickyInterpolation("this"));
     var thing = new YouveGotMessages();
     printOut(thing.method());
     printOut(thing.nonLambda());
     var x = YouveGotMessages.staticMessage();
     printOut(YouveGotMessages.staticMessage());
     printOut(notAlwaysTranslated());
     printOut(originalNotInBMP());
     printOut(escapable());
@@ skipping 31 matching lines @@
   var fr = new Intl("fr");
   var english = new Intl("en_US");
   var de = new Intl("de_DE");
   // Throw in an initialize of a null locale to make sure it doesn't throw.
   initializeMessages(null);
   var f1 = initializeMessages(fr.locale).then((_) => printStuff(fr));
   var f2 = initializeMessages(de.locale).then((_) => printStuff(de));
   printStuff(english);
   return Future.wait([f1, f2]);
 }