Disabled TappingAppIconsHidesHotseat on ChromeOS

Failing first build:
https://ci.chromium.org/p/chromium/builders/ci/Linux%20ChromiumOS%20MSan%20Tests/16066?blamelist=1#blamelist-tab

Suspected CL:
https://chromium-review.googlesource.com/c/chromium/src/+/1893997

TBR=manucornet@chromium.org

Bug: 1021011
Change-Id: I91acd45ed360f5bf4ea24987025bc173b096acb9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1895346
Commit-Queue: Andy Paicu <andypaicu@chromium.org>
Reviewed-by: Andy Paicu <andypaicu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712088}

chrome/browser/ui/ash/launcher/chrome_launcher_controller_browsertest.cc

@@ -2174,10 +2174,17 @@ class HotseatShelfAppBrowserTest : public ShelfAppBrowserTest {
   DISALLOW_COPY_AND_ASSIGN(HotseatShelfAppBrowserTest);
 };
 
+// crbug.com/1021011: Disable on ChromeOS
+#if defined(OS_CHROMEOS)
+#define MAYBE_TappingAppIconsHidesHotseat DISABLED_TappingAppIconsHidesHotseat
+#else
+#define MAYBE_TappingAppIconsHidesHotseat TappingAppIconsHidesHotseat
+#endif
+
 // Tests that launching and switching apps by tapping shelf buttons hides the
 // hotseat.
 IN_PROC_BROWSER_TEST_F(HotseatShelfAppBrowserTest,
-                       TappingAppIconsHidesHotseat) {
+                       MAYBE_TappingAppIconsHidesHotseat) {
   ash::Shell::Get()->tablet_mode_controller()->SetEnabledForTest(true);
 
   // Create two apps, then extend the hotseat.