chromeos: Disables DisplayModeWindowIsInFullscreen

It's flaky, but only on ChromeOS, and only with single-process-mash.

BUG=897879
TEST=test only change
TBR=yigu@chromium.org

Change-Id: I26d5e39edc67c16d1334a2279d7f93796746143a
Reviewed-on: https://chromium-review.googlesource.com/c/1295188Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Yi Gu <yigu@chromium.org>
Commit-Queue: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601798}

chrome/browser/extensions/extension_fullscreen_apitest.cc

@@ -61,11 +61,10 @@ IN_PROC_BROWSER_TEST_F(ExtensionApiTest,
   ASSERT_FALSE(browser()->window()->IsFullscreen());
 }
 
-#if defined(OS_MACOSX) || defined(OS_LINUX) || defined(OS_CHROMEOS)
+#if defined(OS_MACOSX)
 // Fails on MAC: http://crbug.com/480370
-// Fails on chromium.memory/Linux Chromium OS ASan LSan:
-// https://crbug.com/897879
-#define MAYBE_DisplayModeWindowIsInFullscreen DISABLED_DisplayModeWindowIsInFullscreen
+#define MAYBE_DisplayModeWindowIsInFullscreen \
+  DISABLED_DisplayModeWindowIsInFullscreen
 #else
 #define MAYBE_DisplayModeWindowIsInFullscreen DisplayModeWindowIsInFullscreen
 #endif

testing/buildbot/filters/chromeos.single_process_mash.interactive_ui_tests.filter

@@ -94,3 +94,6 @@
 
 # OobeInteractiveUITest: crbug.com/892263
 -OobeInteractiveUITest.SimpleEndToEnd
+
+# This test is flaky. https://crbug.com/897879
+-ExtensionApiTest.DisplayModeWindowIsInFull