Disable WebViewInteractiveTest.KeyboardFocusSimple on Win.

WebViewInteractiveTest.KeyboardFocusSimple flakily times out on some
Windows test bots.

Bug: 846695
Change-Id: Ia15a0244b2857d1b58d74c6f3dd86cc621f02105
Reviewed-on: https://chromium-review.googlesource.com/1073111Reviewed-by: James MacLean <wjmaclean@chromium.org>
Commit-Queue: Ria Jiang <riajiang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#561863}

chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc

@@ -1670,7 +1670,8 @@ IN_PROC_BROWSER_TEST_F(WebViewFocusInteractiveTest, MAYBE_FocusAndVisibility) {
 
 // Flaky on MacOSX, crbug.com/817066.
 // Flaky timeouts on Linux. https://crbug.com/709202
-#if defined(OS_LINUX) || defined(OS_MACOSX)
+// Flaky timeouts on Win. https://crbug.com/846695
+#if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_WIN)
 #define MAYBE_KeyboardFocusSimple DISABLED_KeyboardFocusSimple
 #else
 #define MAYBE_KeyboardFocusSimple KeyboardFocusSimple