[Paint Preview] Disable PlayerCompositorDelegate.OnClick

Flaking due to a bug. I know the root cause, but will address in a
separate CL.

TBR=mahmoudi@chromium.org

Bug: 1087768
Change-Id: If25f17e5c9e4a6c0e2fdfaa4d1d199f4f78434e0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2222543
Commit-Queue: Calder Kitagawa <ckitagawa@chromium.org>
Reviewed-by: Calder Kitagawa <ckitagawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#773202}

components/paint_preview/player/player_compositor_delegate_unittest.cc

@@ -24,7 +24,7 @@
 
 namespace paint_preview {
 
-TEST(PlayerCompositorDelegate, OnClick) {
+TEST(PlayerCompositorDelegate, DISABLED_OnClick) {
   base::test::TaskEnvironment env;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());