Fix connectionState logic in network-summary-item

networkState.connectionState is now an enum not a string, so
!connectionState is no longer a valid test.

Bug: 980659
Change-Id: I9ff24a063fc3bb847b995e48c374786f9b16e567
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1692495
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Auto-Submit: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#675855}

chrome/browser/resources/settings/internet_page/network_summary_item.js

@@ -120,10 +120,10 @@ Polymer({
    * @private
    */
   getConnectionStateText_: function(networkState, deviceState) {
-    const connectionState = networkState ? networkState.connectionState : null;
-    if (!connectionState) {
+    if (!networkState) {
       return '';
     }
+    const connectionState = networkState.connectionState;
     const name =
         networkState ? OncMojo.getNetworkDisplayName(networkState) : '';
     if (OncMojo.connectionStateIsConnected(connectionState)) {