Disable FullscreenElementInABAAndExitViaEscapeKey test.

TBR=sky
NOTRY=true

Bug: 854294
Change-Id: Ic904d41cbc236a8812472e7f0dba0cb45396f256
Reviewed-on: https://chromium-review.googlesource.com/1107135Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568633}

chrome/browser/site_per_process_interactive_browsertest.cc

@@ -849,8 +849,16 @@ void SitePerProcessInteractiveBrowserTest::FullscreenElementInABA(
   EXPECT_EQ("none", GetFullscreenElementId(grandchild));
 }
 
+// This is flaky on Linux (crbug.com/854294)
+#if defined(OS_LINUX)
+#define MAYBE_FullscreenElementInABAAndExitViaEscapeKey \
+  DISABLED_FullscreenElementInABAAndExitViaEscapeKey
+#else
+#define MAYBE_FullscreenElementInABAAndExitViaEscapeKey \
+  FullscreenElementInABAAndExitViaEscapeKey
+#endif
 IN_PROC_BROWSER_TEST_F(SitePerProcessInteractiveBrowserTest,
-                       FullscreenElementInABAAndExitViaEscapeKey) {
+                       MAYBE_FullscreenElementInABAAndExitViaEscapeKey) {
   if (IsMacViewsBrowser())
     return;
   FullscreenElementInABA(FullscreenExitMethod::ESC_PRESS);