Disable CrossFadeAnimateNewLayerOnlyTest.CrossFadeAnimateNewLayerOnly

This test appears to flaky on Chrome OS.

TBR=sammiequon@chromium.org

Bug: 1113901
Change-Id: Ia6e4b0954ec47549e4f69796a096545a9051c332
No-Presubmit: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2341174Reviewed-by: Reilly Grant <reillyg@chromium.org>
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795672}

ash/wm/window_animations_unittest.cc

@@ -434,7 +434,10 @@ class CrossFadeAnimateNewLayerOnlyTest : public AshTestBase {
 // opacity of the new layer, but only the opacity of the old layer. The old
 // layer transform is updated manually when the animation ticks so that it
 // has the same visible bounds as the new layer.
-TEST_F(CrossFadeAnimateNewLayerOnlyTest, CrossFadeAnimateNewLayerOnly) {
+//
+// Flaky on Chrome OS. https://crbug.com/1113901
+TEST_F(CrossFadeAnimateNewLayerOnlyTest,
+       DISABLED_CrossFadeAnimateNewLayerOnly) {
   ui::ScopedAnimationDurationScaleMode test_duration_mode(
       ui::ScopedAnimationDurationScaleMode::NORMAL_DURATION);