[Sheriff] Disable WebKioskAppLauncherTest on MSAN builds

Example failure: https://ci.chromium.org/p/chromium/builders/ci/Linux%20ChromiumOS%20MSan%20Tests/19576

TBR=apotapchuk@chromium.org

Bug: 1097708
Change-Id: I7c926cdffc37ff418b23ed0a5654fb92129260b0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2257199Reviewed-by: Anatoliy Potapchuk <apotapchuk@chromium.org>
Commit-Queue: Anatoliy Potapchuk <apotapchuk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#780709}

chrome/browser/chromeos/app_mode/web_app/web_kiosk_app_launcher_unittest.cc

@@ -180,6 +180,8 @@ class WebKioskAppLauncherTest : public ChromeRenderViewHostTestHarness {
   std::unique_ptr<AppWindowCloser> closer_;
 };
 
+// TODO(crbug.com/1097708): these tests flakily fail on MSAN Builds. 
+#if !defined(MEMORY_SANITIZER)
 TEST_F(WebKioskAppLauncherTest, NormalFlowNotInstalled) {
   SetupAppData(/*installed*/ false);
 
@@ -210,6 +212,7 @@ TEST_F(WebKioskAppLauncherTest, NormalFlowNotInstalled) {
 
   CloseAppWindow();
 }
+#endif
 
 TEST_F(WebKioskAppLauncherTest, NormalFlowAlreadyInstalled) {
   SetupAppData(/*installed*/ true);
@@ -228,6 +231,8 @@ TEST_F(WebKioskAppLauncherTest, NormalFlowAlreadyInstalled) {
   CloseAppWindow();
 }
 
+// TODO(crbug.com/1097708): these tests flakily fail on MSAN Builds. 
+#if !defined(MEMORY_SANITIZER)
 TEST_F(WebKioskAppLauncherTest, NormalFlowBadLaunchUrl) {
   SetupAppData(/*installed*/ false);
 
@@ -299,6 +304,7 @@ TEST_F(WebKioskAppLauncherTest, InstallationRestarted) {
 
   CloseAppWindow();
 }
+#endif
 
 TEST_F(WebKioskAppLauncherTest, UrlNotLoaded) {
   SetupAppData(/*installed*/ false);