Skip WebAudioView placeholder test.

The test for showing the placeholder in WebAudioView is being skipped as it will be migrated to a screenshot test.

Bug: None
No-Presubmit: True
No-Tree-Checks: True
No-Try: True
Change-Id: I133020a25ea4f5e23793c2d54b0524791f238a7e
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6862696
Auto-Submit: Danil Somsikov <dsv@chromium.org>
Reviewed-by: Ergün Erdoğmuş <ergunsh@chromium.org>
Commit-Queue: Eric Leese <leese@chromium.org>
Reviewed-by: Changhao Han <changhaohan@chromium.org>
Reviewed-by: Eric Leese <leese@chromium.org>

Author: danilsomsikov

front_end/panels/web_audio/WebAudioView.test.ts

@@ -22,7 +22,8 @@ describeWithEnvironment('WebAudioView', () => {
     } as unknown as UI.ShortcutRegistry.ShortcutRegistry);
   });
 
-  it('shows placeholder', () => {
+  // Will migrate to screenshot test
+  it.skip('[crbug.com/414631999] shows placeholder', () => {
     const view = new WebAudioView.WebAudioView();
     assert.exists(view.contentElement.querySelector('.empty-state'));
     assert.deepEqual(