sheriff: disable ProfileResetterTest.ResetExtensionsByDisabling on CrOS

TBR=estade@chromium.org

Bug: 995851
Change-Id: I3598ab3248f8bf93701107e56a31ae4757c9358c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1762328Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#688626}

chrome/browser/profile_resetter/profile_resetter_unittest.cc

@@ -508,7 +508,14 @@ TEST_F(ProfileResetterTest, ResetContentSettings) {
   }
 }
 
-TEST_F(ProfileResetterTest, ResetExtensionsByDisabling) {
+#if defined(OS_CHROMEOS)
+// Flaky on ChromeOS: https://crbug.com/995851
+#define MAYBE_ResetExtensionsByDisabling DISABLED_ResetExtensionsByDisabling
+#else
+#define MAYBE_ResetExtensionsByDisabling ResetExtensionsByDisabling
+#endif
+
+TEST_F(ProfileResetterTest, MAYBE_ResetExtensionsByDisabling) {
   service_->Init();
 
   base::ScopedTempDir temp_dir;