[MemSheriff] Disable a flaky CrOS test under MSan.

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 1256 matching lines @@
                        MAYBE_BasicDownloads) {
   AddAllUsers();
 
   // Sanity check that normal operations work in multi-profile setting as well.
   set_test_case_name("keyboardCopyDownloads");
   StartTest();
 }
 
 // Slow tests are disabled on debug build. http://crbug.com/327719
 // Fails on official build. http://crbug.com/429294
-#if !defined(NDEBUG) || defined(OFFICIAL_BUILD)
+// Disabled under MSAN as well. http://crbug.com/468982.
+#if !defined(NDEBUG) || defined(OFFICIAL_BUILD) || defined(MEMORY_SANITIZER)
 #define MAYBE_PRE_BasicDrive DISABLED_PRE_BasicDrive
 #define MAYBE_BasicDrive DISABLED_BasicDrive
 #else
 #define MAYBE_PRE_BasicDrive PRE_BasicDrive
 #define MAYBE_BasicDrive BasicDrive
 #endif
 IN_PROC_BROWSER_TEST_F(MultiProfileFileManagerBrowserTest,
                        MAYBE_PRE_BasicDrive) {
   AddAllUsers();
 }
@@ skipping 195 matching lines @@
   StartTest();
 }
 
 IN_PROC_BROWSER_TEST_F(VideoPlayerBrowserTest, OpenSingleVideoOnDrive) {
   set_test_case_name("openSingleVideoOnDrive");
   StartTest();
 }
 
 }  // namespace
 }  // namespace file_manager