[sheriff] Disable flaky...

[sheriff] Disable flaky RenderWidgetHostViewChildFrameBrowserTest.VisualPropertiesPropagation_RootWindowSegments

on Mac and Linux

TBR=acolwell@chromium.org

Bug: 1089994
Change-Id: Ic20c5e88c3f2b3b0df1c39cbf981ab787c9ef7d8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2461329Reviewed-by: Olga Sharonova <olka@chromium.org>
Commit-Queue: Olga Sharonova <olka@chromium.org>
Cr-Commit-Position: refs/heads/master@{#815143}

content/browser/renderer_host/render_widget_host_view_child_frame_browsertest.cc

@@ -511,8 +511,16 @@ IN_PROC_BROWSER_TEST_F(RenderWidgetHostViewChildFrameBrowserTest,
 
 // Validate that the root widget's window segments are correctly propagated
 // via the SynchronizeVisualProperties cascade.
+// Flaky on Mac and Linux (http://crbug/1089994).
+#if defined(OS_MAC) || defined(OS_LINUX)
+#define MAYBE_VisualPropertiesPropagation_RootWindowSegments \
+  DISABLED_VisualPropertiesPropagation_RootWindowSegments
+#else
+#define MAYBE_VisualPropertiesPropagation_RootWindowSegments \
+  VisualPropertiesPropagation_RootWindowSegments
+#endif
 IN_PROC_BROWSER_TEST_F(RenderWidgetHostViewChildFrameBrowserTest,
-                       VisualPropertiesPropagation_RootWindowSegments) {
+                       MAYBE_VisualPropertiesPropagation_RootWindowSegments) {
   GURL main_url(embedded_test_server()->GetURL(
       "a.com", "/cross_site_iframe_factory.html?a(b(c),a)"));
   EXPECT_TRUE(NavigateToURL(shell(), main_url));