Revert of Disable flaky FeedbackTest.ShowFeedback on Chrome OS

chrome/browser/extensions/api/feedback_private/feedback_browsertest.cc

Index: chrome/browser/extensions/api/feedback_private/feedback_browsertest.cc
diff --git a/chrome/browser/extensions/api/feedback_private/feedback_browsertest.cc b/chrome/browser/extensions/api/feedback_private/feedback_browsertest.cc
index f26e2afb208c2759603221f913c6be1a993550c2..168de50b600924549bab0fc17269fc394d817382 100644
--- a/chrome/browser/extensions/api/feedback_private/feedback_browsertest.cc
+++ b/chrome/browser/extensions/api/feedback_private/feedback_browsertest.cc
@@ -81,13 +81,7 @@
   }
 };
 
-// http://crbug.com/601433
-#if defined(OS_CHROMEOS)
-#define MAYBE_ShowFeedback DISABLED_ShowFeedback
-#else
-#define MAYBE_ShowFeedback ShowFeedback
-#endif
-IN_PROC_BROWSER_TEST_F(FeedbackTest, MAYBE_ShowFeedback) {
+IN_PROC_BROWSER_TEST_F(FeedbackTest, ShowFeedback) {
   WaitForExtensionViewsToLoad();
 
   ASSERT_TRUE(IsFeedbackAppAvailable());