Sheriff: Disable flaky OpenDialogWithMediaRouterAction test.

TBR=takumif@chromium.org

Bug: 1124982
Change-Id: I5464b1abdf11c13fea7d0819abc809d2a6abf184
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2424521Reviewed-by: Darwin Huang <huangdarwin@chromium.org>
Commit-Queue: Darwin Huang <huangdarwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809627}

chrome/browser/ui/views/media_router/media_router_ui_browsertest.cc

@@ -232,8 +232,18 @@ IN_PROC_BROWSER_TEST_F(MediaRouterUIBrowserTest,
   EXPECT_TRUE(ToolbarIconExists());
 }
 
+// TODO(https://crbug.com/1124982): Fix flake on linux-lacros-rel and re-enable
+// this test.
+#if defined(OS_LINUX)
+#define MAYBE_OpenDialogWithMediaRouterAction \
+  DISABLED_OpenDialogWithMediaRouterAction
+#else
+#define MAYBE_OpenDialogWithMediaRouterAction \
+  OpenDialogWithMediaRouterAction
+#endif
+
 IN_PROC_BROWSER_TEST_F(MediaRouterUIBrowserTest,
-                       OpenDialogWithMediaRouterAction) {
+                       MAYBE_OpenDialogWithMediaRouterAction) {
   MediaRouterDialogController* dialog_controller = GetDialogController();
   // We start off at about:blank page.
   // Make sure there is 1 tab and media router is enabled.