Re-enable KeyboardOperations/FileManagerBrowserTest all bots

Enabled in RELEASE, now re-enable this test in DEBUG/MSAN/ASAN.

Bug: 836254
Change-Id: Ia3a271f7ceb9a61aefc6f34ac75e7b28a6894f5c
Reviewed-on: https://chromium-review.googlesource.com/1051551Reviewed-by: Stuart Langley <slangley@chromium.org>
Reviewed-by: Naoki Fukino <fukino@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557403}

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

@@ -148,14 +148,8 @@ WRAPPED_INSTANTIATE_TEST_CASE_P(
         TestParameter(NOT_IN_GUEST_MODE, "createNewFolderDownloads"),
         TestParameter(NOT_IN_GUEST_MODE, "createNewFolderDrive")));
 
-// Fails on official build. http://crbug.com/429294
-#if defined(DISABLE_SLOW_FILESAPP_TESTS) || defined(OFFICIAL_BUILD)
-#define MAYBE_KeyboardOperations DISABLED_KeyboardOperations
-#else
-#define MAYBE_KeyboardOperations KeyboardOperations
-#endif
 WRAPPED_INSTANTIATE_TEST_CASE_P(
-    MAYBE_KeyboardOperations,
+    KeyboardOperations,
     FileManagerBrowserTest,
     ::testing::Values(
         TestParameter(IN_GUEST_MODE, "keyboardDeleteDownloads"),