Temporarily disable testFocusUpdatesSyncronously

The proper fix requires some design work.  The current behavior
does suffer from potential raciness, but shouldn't cause real-world
issues for users.

BUG=859666

Change-Id: I8d502a7db25949d2508675e1d153dbf56f69e1ed
Reviewed-on: https://chromium-review.googlesource.com/1124948Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Bill Orr <billorr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572284}

chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/WebVrInputTest.java

@@ -34,6 +34,7 @@ import org.chromium.base.test.params.ParameterSet;
 import org.chromium.base.test.params.ParameterizedRunner;
 import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.DisableIf;
+import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.MinAndroidSdkLevel;
 import org.chromium.base.test.util.Restriction;
 import org.chromium.base.test.util.RetryOnFailure;
@@ -566,6 +567,7 @@ public class WebVrInputTest {
     /**
      * Tests that focus loss updates synchronously.
      */
+    @DisabledTest(message = "crbug.com/859666")
     @Test
     @MediumTest
     @Restriction(RESTRICTION_TYPE_VIEWER_DAYDREAM)