Marking SiteSettingsTest.testClearDomainCookies as flaky test.

TBR=dullweber@chromium.org

Bug: 1112409
Change-Id: Idf31c4a8d709ddc3f4f87cff63d63881f0198424
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2346853Reviewed-by: Ben Mason <benmason@chromium.org>
Commit-Queue: Ben Mason <benmason@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796524}

chrome/android/javatests/src/org/chromium/chrome/browser/site_settings/SiteSettingsTest.java

@@ -30,6 +30,7 @@ import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.DisableIf;
 import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.Feature;
+import org.chromium.base.test.util.FlakyTest;
 import org.chromium.chrome.browser.flags.ChromeSwitches;
 import org.chromium.chrome.browser.notifications.channels.ChromeChannelDefinitions;
 import org.chromium.chrome.browser.notifications.channels.SiteChannelsManager;
@@ -479,6 +480,7 @@ public class SiteSettingsTest {
     @Test
     @SmallTest
     @Feature({"Preferences"})
+    @FlakyTest(message = "https://crbug.com/1112409")
     public void testClearDomainCookies() throws Exception {
         final String url = mPermissionRule.getURLWithHostName(
                 "test.example.com", "/chrome/test/data/android/cookie.html");