Disable PaymentRequestPaymentAppUiSkipPreloadTest#testPayViaDelayedSlowBobPay

It is flaky

TBR=rouslan@chromium.org
NOTRY=true

Bug: 769851
Change-Id: I4ba160fe8d0916729be86807253c408a4d853404
Reviewed-on: https://chromium-review.googlesource.com/690799Reviewed-by: Xida Chen <xidachen@chromium.org>
Commit-Queue: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505105}

chrome/android/javatests/src/org/chromium/chrome/browser/payments/PaymentRequestPaymentAppUiSkipPreloadTest.java

@@ -16,6 +16,7 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 
 import org.chromium.base.test.util.CommandLineFlags;
+import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.Feature;
 import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.test.ChromeActivityTestRule;
@@ -90,8 +91,9 @@ public class PaymentRequestPaymentAppUiSkipPreloadTest {
      * getInstruments.
      */
     @Test
-    @MediumTest
-    @Feature({"Payments"})
+    // @MediumTest
+    // @Feature({"Payments"})
+    @DisabledTest
     public void testPayViaDelayedSlowBobPay()
             throws InterruptedException, ExecutionException, TimeoutException {
         mPaymentRequestTestRule.installPaymentApp(