Disable flaky test SitePerProcessBrowserTest.FrameOwnerPropertiesPropagationScrolling.

TBR: creis
Bug: 803628
Change-Id: Ieece385b25dd5976704b490f35425b3955759ad5
Reviewed-on: https://chromium-review.googlesource.com/875173Reviewed-by: Sorin Jianu <sorin@chromium.org>
Reviewed-by: Charlie Reis <creis@chromium.org>
Commit-Queue: Sorin Jianu <sorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#530326}

content/browser/site_per_process_browsertest.cc

@@ -4265,7 +4265,8 @@ IN_PROC_BROWSER_TEST_F(SitePerProcessBrowserTest,
 // TODO(bokan): Pretty soon most/all platforms will use overlay scrollbars. This
 // test should find a better way to check for scrollability. crbug.com/662196.
 // Flaky on Linux. crbug.com/790929.
-#if defined(OS_ANDROID) || defined(OS_LINUX)
+// Flaky on Windows. crbug.com/803628.
+#if defined(OS_ANDROID) || defined(OS_LINUX) || defined(OS_WIN)
 #define MAYBE_FrameOwnerPropertiesPropagationScrolling \
         DISABLED_FrameOwnerPropertiesPropagationScrolling
 #else