Disable SettingsUIBrowserTest.All on Windows due to flakiness.

TBR=dpapad@chromium.org

Bug: 887721,711256
Change-Id: I57a9bac7415bf0a3439c6b85e8f1228ceca7d41b
Reviewed-on: https://chromium-review.googlesource.com/1246142Reviewed-by: Evan Stade <estade@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594379}

chrome/test/data/webui/settings/settings_ui_browsertest.js

@@ -26,7 +26,7 @@ SettingsUIBrowserTest.prototype = {
 // and several times that in a Debug build. See https://crbug.com/558434
 // and http://crbug.com/711256.
 
-GEN('#if !defined(NDEBUG) || defined(OS_MACOSX)');
+GEN('#if !defined(NDEBUG) || defined(OS_MACOSX) || defined(OS_WINDOWS)');
 GEN('#define MAYBE_All DISABLED_All');
 GEN('#else');
 GEN('#define MAYBE_All All');