Compile chrome://settings, part 8: the final battle

chrome/browser/resources/options/chromeos/internet_detail.js

Index: chrome/browser/resources/options/chromeos/internet_detail.js
diff --git a/chrome/browser/resources/options/chromeos/internet_detail.js b/chrome/browser/resources/options/chromeos/internet_detail.js
index 5d3e65ba713fc44e70f66cbab1d5e6e7ae08f6d7..b06667329bba16db0d6a9d33d327815f2896d302 100644
--- a/chrome/browser/resources/options/chromeos/internet_detail.js
+++ b/chrome/browser/resources/options/chromeos/internet_detail.js
@@ -114,7 +114,7 @@ cr.define('options.internet', function() {
 
   /**
    * Returns the netmask as a string for a given prefix length.
-   * @param {string} prefixLength The ONC routing prefix length.
+   * @param {number} prefixLength The ONC routing prefix length.
    * @return {string} The corresponding netmask.
    */
   function prefixLengthToNetmask(prefixLength) {
@@ -1184,7 +1184,9 @@ cr.define('options.internet', function() {
     }
     var savedPrefix = onc.getActiveValue('SavedIPConfig.RoutingPrefix');
     if (savedPrefix != undefined) {
-      var savedNetmask = prefixLengthToNetmask(savedPrefix);
+      assert(typeof savedPrefix == 'number');
+      var savedNetmask = prefixLengthToNetmask(
+          /** @type {number} */(savedPrefix));
       inetNetmask.automatic = savedNetmask;
       inetNetmask.value = savedNetmask;
     }
@@ -1210,7 +1212,9 @@ cr.define('options.internet', function() {
     }
     var staticPrefix = onc.getActiveValue('StaticIPConfig.RoutingPrefix');
     if (staticPrefix != undefined) {
-      var staticNetmask = prefixLengthToNetmask(staticPrefix);
+      assert(typeof staticPrefix == 'number');
+      var staticNetmask = prefixLengthToNetmask(
+          /** @type {number} */(staticPrefix));
       inetNetmask.user = staticNetmask;
       inetNetmask.value = staticNetmask;
     }