Skip VideoCaptureDeviceTest.OpenInvalidDevice on macOS.

Speculative disable these tests since the failure seems similar
to crbug.com/1069608 on ChromeOS.

Bug: 1129807, 1128470
Change-Id: I33eb4db810b57ddb46f1c6982ced26b45f59fcb2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2429263Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Mirko Bonadei <mbonadei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810279}

media/capture/video/video_capture_device_unittest.cc

@@ -466,7 +466,8 @@ class VideoCaptureDeviceTest
 
 // Causes a flaky crash on Chrome OS. https://crbug.com/1069608
 // Cause hangs on Windows Debug. http://crbug.com/417824
-#if defined(OS_CHROMEOS) || (defined(OS_WIN) && !defined(NDEBUG))
+#if defined(OS_CHROMEOS) || (defined(OS_WIN) && !defined(NDEBUG)) || \
+    defined(OS_MAC)
 #define MAYBE_OpenInvalidDevice DISABLED_OpenInvalidDevice
 #else
 #define MAYBE_OpenInvalidDevice OpenInvalidDevice