Disable flaky CopyBetweenWindows/FileManagerBrowserTest.Test/4.

Has been failing every 3rd or 4th pass on the waterfall.

BUG=380339
NOTRY=true
TBR=kinaba@chromium.org

Review URL: https://codereview.chromium.org/310923002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274619 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

@@ -881,8 +881,11 @@ INSTANTIATE_TEST_CASE_P(
     ::testing::Values(TestParameter(NOT_IN_GUEST_MODE, "thumbnailsDownloads"),
                       TestParameter(IN_GUEST_MODE, "thumbnailsDownloads")));
 
+// Test/4 has been failing every 3rd or 4th pass on the waterfall for
+// "Linux ChromiumOS Tests (dbg)".
+// http://crbug.com/380339
 INSTANTIATE_TEST_CASE_P(
-    CopyBetweenWindows,
+    DISABLED_CopyBetweenWindows,
     FileManagerBrowserTest,
     ::testing::Values(
         TestParameter(NOT_IN_GUEST_MODE, "copyBetweenWindowsLocalToDrive"),