Fix chrome://network CSS for cr-network-icon

ui/webui/resources/cr_elements/cr_network_icon/cr_network_icon.css

Index: ui/webui/resources/cr_elements/cr_network_icon/cr_network_icon.css
diff --git a/ui/webui/resources/cr_elements/cr_network_icon/cr_network_icon.css b/ui/webui/resources/cr_elements/cr_network_icon/cr_network_icon.css
index 1ba47291cea1697e309ebb62a29f82c0e79f3f72..8c8603e6b4745f441de843b2b29bd835495b4650 100644
--- a/ui/webui/resources/cr_elements/cr_network_icon/cr_network_icon.css
+++ b/ui/webui/resources/cr_elements/cr_network_icon/cr_network_icon.css
@@ -2,8 +2,10 @@
  * 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 {
-  display: inline-block;
+  display: block;
   height: 50px;
   overflow: hidden;
   position: relative;