Don't detect runtime type information use except in the codegen queue.

TBR=ngeoffray@google.com

Review URL: https://codereview.chromium.org//10984042

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@12902 260f80e4-7a28-3924-810f-c04153c831b5

lib/compiler/implementation/enqueue.dart

@@ -129,7 +129,9 @@ class Enqueuer {
     queue.add(new WorkItem(element, elements, itemCompilationContextCreator()));
 
     // Enable runtime type support if we discover a getter called runtimeType.
-    if (element.isGetter() && element.name == Compiler.RUNTIME_TYPE) {
+    if (!isResolutionQueue &&
+        element.isGetter() &&
+        element.name == Compiler.RUNTIME_TYPE) {
       compiler.enabledRuntimeType = true;
     }