Fix flakiness in FileManager SuggestAppDialog test

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Browser test for basic Chrome OS file manager functionality:
 //  - The file list is updated when a file is added externally to the Downloads
 //    folder.
 //  - Selecting a file and copy-pasting it with the keyboard copies the file.
 //  - Selecting a file and pressing delete deletes it.
 
@@ skipping 1022 matching lines @@
 #define MAYBE_Traverse Traverse
 #endif
 WRAPPED_INSTANTIATE_TEST_CASE_P(
     MAYBE_Traverse,
     FileManagerBrowserTest,
     ::testing::Values(TestParameter(IN_GUEST_MODE, "traverseDownloads"),
                       TestParameter(NOT_IN_GUEST_MODE, "traverseDownloads"),
                       TestParameter(NOT_IN_GUEST_MODE, "traverseDrive")));
 
 // Slow tests are disabled on debug build. http://crbug.com/327719
-// Disabled under MSAN, ASAN, and LSAN as well. http://crbug.com/479757.
-// Flakes often: http://crbug.com/479757
+// Disabled under MSAN as well. http://crbug.com/468980.
+#if !defined(NDEBUG) || defined(MEMORY_SANITIZER)
+#define MAYBE_SuggestAppDialog DISABLED_SuggestAppDialog
+#else
+#define MAYBE_SuggestAppDialog SuggestAppDialog
+#endif
 WRAPPED_INSTANTIATE_TEST_CASE_P(
-    DISABLED_SuggestAppDialog,
+    MAYBE_SuggestAppDialog,
     FileManagerBrowserTest,
     ::testing::Values(TestParameter(NOT_IN_GUEST_MODE, "suggestAppDialog")));
 
 // Slow tests are disabled on debug build. http://crbug.com/327719
 // Disabled under MSAN as well. http://crbug.com/468980.
 #if !defined(NDEBUG) || defined(MEMORY_SANITIZER)
 #define MAYBE_ExecuteDefaultTaskOnDownloads \
   DISABLED_ExecuteDefaultTaskOnDownloads
 #else
 #define MAYBE_ExecuteDefaultTaskOnDownloads ExecuteDefaultTaskOnDownloads
@@ skipping 484 matching lines @@
   StartTest();
 }
 
 IN_PROC_BROWSER_TEST_F(VideoPlayerBrowserTest, OpenSingleVideoOnDrive) {
   set_test_case_name("openSingleVideoOnDrive");
   StartTest();
 }
 
 }  // namespace
 }  // namespace file_manager