Disable WebAppBannerCreatedDirectMultipleLargerTotal test due to flakiness.

chrome/browser/banners/app_banner_manager_browsertest.cc

Index: chrome/browser/banners/app_banner_manager_browsertest.cc
diff --git a/chrome/browser/banners/app_banner_manager_browsertest.cc b/chrome/browser/banners/app_banner_manager_browsertest.cc
index 1cd312703051dc08fa3418eb3aae8b696584567f..3db23e96bee769cf854a1594e671eb4d505af81d 100644
--- a/chrome/browser/banners/app_banner_manager_browsertest.cc
+++ b/chrome/browser/banners/app_banner_manager_browsertest.cc
@@ -206,8 +206,16 @@ IN_PROC_BROWSER_TEST_F(AppBannerManagerBrowserTest,
                 ui::PAGE_TRANSITION_GENERATED, 3, SHOWING_WEB_APP_BANNER, true);
 }
 
+// Disabled due to flakiness: crbug.com/661511.
+#if defined(OS_LINUX) || defined(OS_WIN)
+#define MAYBE_WebAppBannerCreatedDirectMultipleLargerTotal \
+    DISABLED_WebAppBannerCreatedDirectMultipleLargerTotal
+#else
+#define MAYBE_WebAppBannerCreatedDirectMultipleLargerTotal \
+    WebAppBannerCreatedDirectMultipleLargerTotal
+#endif
 IN_PROC_BROWSER_TEST_F(AppBannerManagerBrowserTest,
-                       WebAppBannerCreatedDirectMultipleLargerTotal) {
+                       MAYBE_WebAppBannerCreatedDirectMultipleLargerTotal) {
   AppBannerSettingsHelper::SetEngagementWeights(0.5, 1);
   AppBannerSettingsHelper::SetTotalEngagementToTrigger(3);
   RunBannerTest("/banners/manifest_test_page.html",