hosted-apps: Disable flaky immersive mode test

https://ci.chromium.org/buildbot/chromium.chromiumos/linux-chromeos-dbg/5170

TBR=ortuno@chromium.org

Bug: 832544
Change-Id: I0252cf8bcf5c0c16028830fa92ac69b644a7397f
Reviewed-on: https://chromium-review.googlesource.com/1011529Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Commit-Queue: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550558}

chrome/browser/ui/views/frame/immersive_mode_controller_ash_browsertest.cc

@@ -91,6 +91,12 @@ class ImmersiveModeControllerAshHostedAppBrowserTest
   DISALLOW_COPY_AND_ASSIGN(ImmersiveModeControllerAshHostedAppBrowserTest);
 };
 
+// https://crbug.com/832544 Flaky
+#if defined(OS_CHROMEOS)
+#define MAYBE_Layout DISABLED_Layout
+#else
+#define MAYBE_Layout Layout
+#endif
 // Test the layout and visibility of the TopContainerView and web contents when
 // a hosted app is put into immersive fullscreen.
 IN_PROC_BROWSER_TEST_F(ImmersiveModeControllerAshHostedAppBrowserTest, Layout) {