Disable testToolbarSwipePrevTab test.

Tbr: skyostil@chromium.org
Bug: 863676
Change-Id: I00165973f5135273938f5ca23362c7964c69c1fd
Reviewed-on: https://chromium-review.googlesource.com/1138409Reviewed-by: Owen Min <zmin@chromium.org>
Commit-Queue: Owen Min <zmin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575321}

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

@@ -1489,6 +1489,7 @@ public class TabsTest {
     @Feature({"Android-TabSwitcher"})
     @Restriction(RESTRICTION_TYPE_NON_LOW_END_DEVICE)
     @RetryOnFailure
+    @DisabledTest(message = "crbug.com/863676")
     public void testToolbarSwipePrevTab() throws InterruptedException, TimeoutException {
         ChromeTabUtils.newTabFromMenu(
                 InstrumentationRegistry.getInstrumentation(), mActivityTestRule.getActivity());