Re-enable testRedirectionFromIntentWarm

This test is probably still flaky, but I can't repro and there isn't
enough data on the flakiness dashboard to figure out what configurations
this test is flaky on.

If this test is still highly flaky I'll revert this change.

Bug: 1153686
Change-Id: Icf2d73c4e9901a4a590dd03a668cb72cb609971f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2584648Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835784}

chrome/android/javatests/src/org/chromium/chrome/browser/externalnav/UrlOverridingTest.java

@@ -35,7 +35,6 @@ import org.chromium.base.test.util.CallbackHelper;
 import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.Criteria;
 import org.chromium.base.test.util.CriteriaHelper;
-import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.ScalableTimeout;
 import org.chromium.chrome.browser.ChromeTabbedActivity;
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
@@ -450,7 +449,6 @@ public class UrlOverridingTest {
 
     @Test
     @SmallTest
-    @DisabledTest(message = "https://crbug.com/1153686")
     public void testRedirectionFromIntentWarm() throws Exception {
         Context context = ContextUtils.getApplicationContext();
         mActivityTestRule.startMainActivityOnBlankPage();