Disable Flaky WebContentsImplBrowserTest NotifyFullscreenAcquired_Navigate

The test WebContentsImplBrowserTest NotifyFullscreenAcquired_Navigate Flakes
has been flaking on Android for some time. The owner of the test is currently OOO.
So I'm disabling it on Android.

TBR=boliu@chromium.org
TEST=WebContentsImplBrowserTest NotifyFullscreenAcquired_Navigate

Bug: 855018
Change-Id: I1e3f71e696e6186663ee162a81a1f3bed5ad80c5
Reviewed-on: https://chromium-review.googlesource.com/1146261
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Reviewed-by: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577164}

content/browser/web_contents/web_contents_impl_browsertest.cc

@@ -2630,8 +2630,15 @@ IN_PROC_BROWSER_TEST_F(WebContentsImplBrowserTest, NotifyFullscreenAcquired) {
   }
 }
 
+// TODO(beccahughes@): This test is flaking on Android. https://crbug.com/855018
+#if defined(OS_ANDROID)
+#define MAYBE_NotifyFullscreenAcquired_Navigate \
+    DISABLED_NotifyFullscreenAcquired_Navigate
+#else
+#define MAYBE_NotifyFullscreenAcquired_Navigate NotifyFullscreenAcquired_Navigate
+#endif
 IN_PROC_BROWSER_TEST_F(WebContentsImplBrowserTest,
-                       NotifyFullscreenAcquired_Navigate) {
+                       MAYBE_NotifyFullscreenAcquired_Navigate) {
   ASSERT_TRUE(embedded_test_server()->Start());
   WebContentsImpl* web_contents =
       static_cast<WebContentsImpl*>(shell()->web_contents());