Disable tests on MSAN and ASAN

These 2 tests are flaky on MSAN and ASAN, disabling it them until they
get fixed.

Bug: 899664
Change-Id: I0ee7b0fd58731f47b03637f21a55f27254ae576b
Reviewed-on: https://chromium-review.googlesource.com/c/1317210Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605238}

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

@@ -278,9 +278,12 @@ WRAPPED_INSTANTIATE_TEST_CASE_P(
 WRAPPED_INSTANTIATE_TEST_CASE_P(
     CreateNewFolder, /* create_new_folder.js */
     FilesAppBrowserTest,
-    ::testing::Values(TestCase("selectCreateFolderDownloads").InGuestMode(),
-                      TestCase("selectCreateFolderDownloads"),
+    ::testing::Values(TestCase("selectCreateFolderDownloads"),
+// Some GuestMode tests are flaky on MSAN and ASAN, crbug.com/899664
+#if !(defined(MEMORY_SANITIZER) || defined(ADDRESS_SANITIZER))
+                      TestCase("selectCreateFolderDownloads").InGuestMode(),
                       TestCase("createFolderDownloads").InGuestMode(),
+#endif
                       TestCase("createFolderDownloads"),
                       TestCase("createFolderNestedDownloads"),
                       TestCase("createFolderDrive").DisableDriveFs(),