Disable broken WebappDisplayModeTest.

TBR=pkotwicz@chromium.org

Bug: 1028636
Change-Id: Ib43142773bc7ae526d8e45149384bee16f1a7663
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1935370Reviewed-by: Ender <ender@google.com>
Auto-Submit: Ender <ender@google.com>
Commit-Queue: Ender <ender@google.com>
Cr-Commit-Position: refs/heads/master@{#719268}

chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappDisplayModeTest.java

@@ -17,6 +17,7 @@ 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.R;
 import org.chromium.chrome.browser.ChromeSwitches;
@@ -89,6 +90,7 @@ public class WebappDisplayModeTest {
 
     @Test
     @SmallTest
+    @DisabledTest(message = "https://crbug.com/1028636")
     @Feature({"Webapps"})
     public void testMinimalUi() {
         WebappActivity activity = startActivity(WebDisplayMode.MINIMAL_UI, "");