policy_ExtensionAllowedTypes: disable test

This test is failing on the majority of its runs.
Disable it until it can be fixed.

BUG=b:171582298
TEST=none

Change-Id: Ic2fb2d1660244a5c71f3c6cff5e386c7a5061473
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/2495571
Tested-by: Ross Zwisler <zwisler@google.com>
Auto-Submit: Ross Zwisler <zwisler@google.com>
Reviewed-by: Marc Grimme <marcgrimme@google.com>
Reviewed-by: Ross Zwisler <zwisler@google.com>
Commit-Queue: Ross Zwisler <zwisler@google.com>
diff --git a/client/site_tests/policy_ExtensionAllowedTypes/control.none b/client/site_tests/policy_ExtensionAllowedTypes/control.none
index 2cfe40a..1e96397 100644
--- a/client/site_tests/policy_ExtensionAllowedTypes/control.none
+++ b/client/site_tests/policy_ExtensionAllowedTypes/control.none
@@ -4,7 +4,8 @@
 
 AUTHOR = 'dbeckett'
 NAME = 'policy_ExtensionAllowedTypes.none'
-ATTRIBUTES = 'suite:ent-nightly, suite:policy'
+# Disable this test until it can be fixed: http://b/171582298
+# ATTRIBUTES = 'suite:ent-nightly, suite:policy'
 TIME = 'SHORT'
 TEST_CATEGORY = 'General'
 TEST_CLASS = 'enterprise'
diff --git a/client/site_tests/policy_ExtensionAllowedTypes/control.theme b/client/site_tests/policy_ExtensionAllowedTypes/control.theme
index 1e70484..67ead6f 100644
--- a/client/site_tests/policy_ExtensionAllowedTypes/control.theme
+++ b/client/site_tests/policy_ExtensionAllowedTypes/control.theme
@@ -4,7 +4,8 @@
 
 AUTHOR = 'dbeckett'
 NAME = 'policy_ExtensionAllowedTypes.theme'
-ATTRIBUTES = 'suite:ent-nightly, suite:policy'
+# Disable this test until it can be fixed: http://b/171582298
+# ATTRIBUTES = 'suite:ent-nightly, suite:policy'
 TIME = 'SHORT'
 TEST_CATEGORY = 'General'
 TEST_CLASS = 'enterprise'