Disable flaky FeedbackTest.ShowLoginFeedback 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 168de50b600924549bab0fc17269fc394d817382..c18fb435ccd49235f7574066adc07983b94d4608 100644
--- a/chrome/browser/extensions/api/feedback_private/feedback_browsertest.cc
+++ b/chrome/browser/extensions/api/feedback_private/feedback_browsertest.cc
@@ -89,7 +89,13 @@ IN_PROC_BROWSER_TEST_F(FeedbackTest, ShowFeedback) {
   VerifyFeedbackAppLaunch();
 }
 
-IN_PROC_BROWSER_TEST_F(FeedbackTest, ShowLoginFeedback) {
+// http://crbug.com/601306
+#if defined(OS_CHROMEOS)
+#define MAYBE_ShowLoginFeedback DISABLED_ShowLoginFeedback
+#else
+#define MAYBE_ShowLoginFeedback ShowLoginFeedback
+#endif
+IN_PROC_BROWSER_TEST_F(FeedbackTest, MAYBE_ShowLoginFeedback) {
   WaitForExtensionViewsToLoad();
 
   ASSERT_TRUE(IsFeedbackAppAvailable());