Disable flaky VirtualTimeHistoryNavigation

Fully disabled now since it started failing on linux_chromium_rel_ng
too.

Tbr: pfeldman@chromium.org
Bug: 859382
Change-Id: Ic5dc2df56629d32b4ac76b3a8f6607cfa32db92d
Reviewed-on: https://chromium-review.googlesource.com/1124000Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572110}

headless/test/headless_protocol_browsertest.cc

@@ -218,15 +218,9 @@ HEADLESS_PROTOCOL_TEST(VirtualTimeStarvation,
                        "emulation/virtual-time-starvation.js");
 HEADLESS_PROTOCOL_TEST(VirtualTimeVideo, "emulation/virtual-time-video.js");
 
-// Failing on MacOS10.13 (dbg) crbug.com/859382
-#if defined(OS_MACOSX)
-#define MAYBE_VirtualTimeHistoryNavigation DISABLED_VirtualTimeHistoryNavigation
-#else
-#define MAYBE_VirtualTimeHistoryNavigation VirtualTimeHistoryNavigation
-#endif
-HEADLESS_PROTOCOL_TEST(MAYBE_VirtualTimeHistoryNavigation,
+// Flaky Test crbug.com/859382
+HEADLESS_PROTOCOL_TEST(DISABLED_VirtualTimeHistoryNavigation,
                        "emulation/virtual-time-history-navigation.js");
-#undef MAYBE_VirtualTimeHistoryNavigation
 
 // http://crbug.com/633321
 #if defined(OS_ANDROID)