Disable CreateNewFolder/FileManagerBrowserTest.Test/3 as its failing on most try runs.

BUG=327719
TBR=hirono@chromium.org

Review URL: https://codereview.chromium.org/608803002

Cr-Commit-Position: refs/heads/master@{#296940}

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

@@ -815,14 +815,9 @@ WRAPPED_INSTANTIATE_TEST_CASE_P(
         TestParameter(NOT_IN_GUEST_MODE, "audioRepeatMultipleFileDrive"),
         TestParameter(NOT_IN_GUEST_MODE, "audioNoRepeatMultipleFileDrive")));
 
-// Slow tests are disabled on debug build. http://crbug.com/327719
-#if !defined(NDEBUG)
-#define MAYBE_CreateNewFolder DISABLED_CreateNewFolder
-#else
-#define MAYBE_CreateNewFolder CreateNewFolder
-#endif
+// Flaky http://crbug.com/327719
 WRAPPED_INSTANTIATE_TEST_CASE_P(
-    MAYBE_CreateNewFolder,
+    DISABLED_CreateNewFolder,
     FileManagerBrowserTest,
     ::testing::Values(TestParameter(NOT_IN_GUEST_MODE,
                                     "createNewFolderAfterSelectFile"),