Re-enable OpenAudioFiles/FileManagerBrowserTest

Enabled in RELEASE, now re-enable in DEBUG/ASAN. Note MSAN is TIMEOUT
so keep it disabled there.

OpenAudioFiles/FileManagerBrowserTest.Test/1 TIMEOUT (3 in a row).

Bug: 836254
Change-Id: I80e32f126d1e5594a863dc170cec399fb46afa12
Reviewed-on: https://chromium-review.googlesource.com/1056897
Commit-Queue: Noel Gordon <noel@chromium.org>
Reviewed-by: Sasha Morrissey <sashab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558225}

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

@@ -113,8 +113,8 @@ WRAPPED_INSTANTIATE_TEST_CASE_P(
                       TestParameter(NOT_IN_GUEST_MODE, "videoOpenDownloads"),
                       TestParameter(NOT_IN_GUEST_MODE, "videoOpenDrive")));
 
-// Fails on official build. http://crbug.com/429294
-#if defined(DISABLE_SLOW_FILESAPP_TESTS) || defined(OFFICIAL_BUILD)
+// TIMEOUT PASS on MSAN, https://crbug.com/836254
+#if defined(MEMORY_SANITIZER)
 #define MAYBE_OpenAudioFiles DISABLED_OpenAudioFiles
 #else
 #define MAYBE_OpenAudioFiles OpenAudioFiles