mac: mark ServiceProcessStateFileManipulationTest DeleteFile as flaky

Bug: 903823, 892176
Change-Id: I30a2f92478a4b260191deb7faf4aa2a21acc2609
Reviewed-on: https://chromium-review.googlesource.com/c/1329346Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607208}

chrome/common/service_process_util_mac_unittest.mm

@@ -129,7 +129,8 @@ TEST_F(ServiceProcessStateFileManipulationTest, VerifyLaunchD) {
       << " exit_code:" << exit_code << " " << output;
 }
 
-TEST_F(ServiceProcessStateFileManipulationTest, DeleteFile) {
+// Flaky: https://crbug.com/903823
+TEST_F(ServiceProcessStateFileManipulationTest, DISABLED_DeleteFile) {
   GetIOTaskRunner()->PostTask(FROM_HERE,
                               base::Bind(&DeleteFunc, executable_path()));
   Run();