Allow a single translation to be from multiple differently-named sources

pkg/intl/test/message_extraction/sample_with_messages.dart

Index: pkg/intl/test/message_extraction/sample_with_messages.dart
diff --git a/pkg/intl/test/message_extraction/sample_with_messages.dart b/pkg/intl/test/message_extraction/sample_with_messages.dart
index ede8896902a656090f88c08f9b346773b7480011..344075bda136a41094f6529553d89105e5a1488c 100644
--- a/pkg/intl/test/message_extraction/sample_with_messages.dart
+++ b/pkg/intl/test/message_extraction/sample_with_messages.dart
@@ -110,6 +110,14 @@ nestedOuter(number, gen) => Intl.plural(number,
     name: 'nestedOuter',
     args: [number, gen]);
 
+sameContentsDifferentName() => Intl.message("Hello World",
+    name: "sameContentsDifferentName",
+    desc: "One of two messages with the same contents, but different names");
+
+differentNameSameContents() => Intl.message("Hello World",
+    name: "differentNameSameContents",
+    desc: "One of two messages with the same contents, but different names");
+
 printStuff(Intl locale) {
 
   // Use a name that's not a literal so this will get skipped. Then we have
@@ -193,6 +201,8 @@ printStuff(Intl locale) {
     printOut(nestedSelect("CDN", 2));
     printOut(pluralThatFailsParsing(1));
     printOut(pluralThatFailsParsing(2));
+    printOut(differentNameSameContents());
+    printOut(sameContentsDifferentName());
   });
 }