Disable EventsApiTest.NewlyIntroducedListener on non-Mac.

The test randomly times out.

BUG=833854
TBR=yoichio@chromium.org
NOTRY=true

Change-Id: Iffd451c87381c6d6520fd8ba8ba51beeadd2e30c
Reviewed-on: https://chromium-review.googlesource.com/1025138Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#552884}

chrome/browser/extensions/events_apitest.cc

@@ -4,6 +4,7 @@
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
+#include "build/build_config.h"
 #include "chrome/browser/extensions/chrome_extension_test_notification_observer.h"
 #include "chrome/browser/extensions/chrome_extensions_browser_client.h"
 #include "chrome/browser/extensions/chrome_test_extension_loader.h"
@@ -212,9 +213,15 @@ IN_PROC_BROWSER_TEST_F(EventsApiTest,
   }
 }
 
+// Disabled on non-Mac due to flaky timeouts. https://crbug.com/833854
+#if !defined(OS_MACOSX)
+#define MAYBE_NewlyIntroducedListener DISABLED_NewlyIntroducedListener
+#else
+#define MAYBE_NewlyIntroducedListener NewlyIntroducedListener
+#endif
 // Tests that if an extension's updated version has a new lazy listener, it
 // fires properly after the update.
-IN_PROC_BROWSER_TEST_F(EventsApiTest, NewlyIntroducedListener) {
+IN_PROC_BROWSER_TEST_F(EventsApiTest, MAYBE_NewlyIntroducedListener) {
   std::vector<ExtensionCRXData> data;
   data.emplace_back("v1");
   data.emplace_back("v2");