Revert of Disable testBannerAppearsThenDoesNotAppearAgainForCustomTime (flaky)

chrome/android/javatests/src/org/chromium/chrome/browser/banners/AppBannerManagerTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/banners/AppBannerManagerTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/banners/AppBannerManagerTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/banners/AppBannerManagerTest.java
index 5c20d1fd5b8ecab3315e068e6d7c39e6f177400c..ee3b521bccd7a6b452bf1433fdbaf5ded7c1bf03 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/banners/AppBannerManagerTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/banners/AppBannerManagerTest.java
@@ -21,7 +21,6 @@
 import android.widget.TextView;
 
 import org.chromium.base.ThreadUtils;
-import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.Feature;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ShortcutHelper;
@@ -419,9 +418,8 @@
         waitUntilAppBannerInfoBarAppears(NATIVE_APP_TITLE);
     }
 
-    // @MediumTest
-    // @Feature({"AppBanners"})
-    @DisabledTest
+    @MediumTest
+    @Feature({"AppBanners"})
     public void testBannerAppearsThenDoesNotAppearAgainForCustomTime() throws Exception {
         AppBannerManager.setDaysAfterDismissAndIgnoreForTesting(7, 7);
         triggerWebAppBanner(mWebAppUrl, WEB_APP_TITLE, false);