Revert of Re-enable IncognitoNotificationServiceTest.testSingleRunningChromeTabbedActivity

chrome/android/javatests/src/org/chromium/chrome/browser/incognito/IncognitoNotificationServiceTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/incognito/IncognitoNotificationServiceTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/incognito/IncognitoNotificationServiceTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/incognito/IncognitoNotificationServiceTest.java
index e57b1d4427f217264c55d1395cac5e356a9d9afa..145ff65c341a95959c899f5f3c30c34854049a19 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/incognito/IncognitoNotificationServiceTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/incognito/IncognitoNotificationServiceTest.java
@@ -12,6 +12,7 @@
 
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.library_loader.LibraryLoader;
+import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.Feature;
 import org.chromium.base.test.util.RetryOnFailure;
 import org.chromium.chrome.browser.TabState;
@@ -56,8 +57,10 @@
 
     }
 
+    // Flaky, see crbug.com/671268
     // @Feature("Incognito")
     // @MediumTest
+    @DisabledTest
     public void testSingleRunningChromeTabbedActivity()
             throws InterruptedException, CanceledException {
         startMainActivityOnBlankPage();