Apply internal chrome_extensions.js review feedback.

TBR=
BUG=

Review URL: https://codereview.chromium.org/1140093004

Cr-Commit-Position: refs/heads/master@{#329779}

third_party/closure_compiler/externs/chrome_extensions.js

@@ -8966,7 +8966,7 @@ chrome.networkingPrivate.onNetworksChanged;
 chrome.networkingPrivate.onNetworkListChanged;
 
 
-/** @type {!ChromeStringArrayEvent} */
+/** @type {!ChromeEvent} */
 chrome.networkingPrivate.onDeviceStateListChanged;