Re-enable Transfer/FileManagerBrowserTest all bots

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

Bug: 835626
Change-Id: Ie214d9ef7241ab084772010b2a854e50ef051b67
Reviewed-on: https://chromium-review.googlesource.com/1049347Reviewed-by: Naoki Fukino <fukino@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556741}

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

@@ -254,14 +254,8 @@ WRAPPED_INSTANTIATE_TEST_CASE_P(
         TestParameter(NOT_IN_GUEST_MODE, "clickFirstSearchResult"),
         TestParameter(NOT_IN_GUEST_MODE, "pressEnterToSearch")));
 
-// Fails on official build. http://crbug.com/429294
-#if defined(DISABLE_SLOW_FILESAPP_TESTS) || defined(OFFICIAL_BUILD)
-#define MAYBE_Transfer DISABLED_Transfer
-#else
-#define MAYBE_Transfer Transfer
-#endif
 WRAPPED_INSTANTIATE_TEST_CASE_P(
-    MAYBE_Transfer,
+    Transfer,
     FileManagerBrowserTest,
     ::testing::Values(
         TestParameter(NOT_IN_GUEST_MODE, "transferFromDriveToDownloads"),