Disable flaky test org.chromium.chrome.browser.TabsTest#testTabsAreDestroyedOnModelDestruction

TBR: mdjones@chromium.org
Bug: 901986
Change-Id: Id217b2021bad98a79e344de5ad647d0638233842
Reviewed-on: https://chromium-review.googlesource.com/c/1318675Reviewed-by: Dmitry Titov <dimich@chromium.org>
Commit-Queue: Dmitry Titov <dimich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605495}

chrome/android/javatests/src/org/chromium/chrome/browser/TabsTest.java

@@ -1844,7 +1844,9 @@ public class TabsTest {
         Assert.assertTrue("notifyChanged() was not called", mNotifyChangedCalled);
     }
 
+    // Flaky: http://crbug.com/901986
     @Test
+    @DisabledTest
     @MediumTest
     @Feature({"Android-TabSwitcher"})
     @RetryOnFailure