Marking testAutoDownloadsDialog as flaky.

TBR=andypaicu@chromium.org

Bug: 1108800
Change-Id: I4d4bbda03d49039a378764db2a92f2463e67a353
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2316316Reviewed-by: Ben Mason <benmason@chromium.org>
Commit-Queue: Ben Mason <benmason@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791265}

chrome/android/javatests/src/org/chromium/chrome/browser/download/AutoDownloadsTest.java

@@ -19,6 +19,7 @@ import org.chromium.base.PathUtils;
 import org.chromium.base.test.util.CloseableOnMainThread;
 import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.Feature;
+import org.chromium.base.test.util.FlakyTest;
 import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.download.DownloadTestRule.CustomMainActivityStart;
 import org.chromium.chrome.browser.flags.ChromeSwitches;
@@ -69,6 +70,7 @@ public class AutoDownloadsTest implements CustomMainActivityStart {
     @Test
     @MediumTest
     @Feature({"AutoDownloads"})
+    @FlakyTest(message = "https://crbug.com/1108800")
     public void testAutoDownloadsDialog() throws Exception {
         try (CloseableOnMainThread ignored = CloseableOnMainThread.StrictMode.allowDiskWrites()) {
             ArrayList<DirectoryOption> dirOptions = new ArrayList<>();