Move common cr-policy-indicator behavior into CrPolicyIndicatorBehavior

ui/webui/resources/cr_elements/policy/cr_policy_indicator.css

Index: ui/webui/resources/cr_elements/policy/cr_policy_indicator.css
diff --git a/ui/webui/resources/cr_elements/policy/cr_policy_indicator.css b/ui/webui/resources/cr_elements/policy/cr_policy_indicator.css
deleted file mode 100644
index 26b4fb2543cd3df4e0967f12ce282794414df81c..0000000000000000000000000000000000000000
--- a/ui/webui/resources/cr_elements/policy/cr_policy_indicator.css
+++ /dev/null
@@ -1,9 +0,0 @@
-/* Copyright 2015 The Chromium Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file. */
-
-/* Note: we use display: block here to avoid positioning issues related to
- * the use of overflow: hidden. */
-:host {
-  @apply(--cr-policy-indicator);
-}