Disable flaky test FaceDetectionImplMacTest.ScanOneFace

Bug: 1107962
Change-Id: Ibb57e754136237e906fff151cffae8a2d167901e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2310836
Auto-Submit: Phillis Tang <phillis@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790546}

services/shape_detection/face_detection_impl_mac_unittest.mm

@@ -148,7 +148,8 @@ TEST_P(FaceDetectionImplMacTest, CreateAndDestroy) {
   }
 }
 
-TEST_P(FaceDetectionImplMacTest, ScanOneFace) {
+// Flakily fails on multiple configurations. https://crbug.com/1107962
+TEST_P(FaceDetectionImplMacTest, DISABLED_ScanOneFace) {
   // Face detection test needs a GPU.
   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kUseGpuInTests)) {