Enable Chrome OS WiMAX debugging in chrome://net-internals.

chrome/browser/resources/net_internals/chromeos_view.html

 <div id="chromeos-view-tab-content" class=content-box>
   <h3>Import ONC file</h3>
   <div id="chromeos-view-import-div">
     <input type="file" id="chromeos-view-import-onc">
   </div>
   <div id="chromeos-view-password-div" hidden>
     This onc file appears to be encrypted.  Please provide the decryption key:
     <div>
       <input type="password" id="chromeos-view-onc-password">
     </div>
   </div>
   <div id="chromeos-view-parse-status" hidden>
   </div>
   <div id="chromeos-view-store-debug-logs-div">
     <h3>Store Logs</h3>
     <input type="button"
-           id="chromeos-view-store-debug-logs"
-           value="Store Debug Logs">
+           id="chromeos-view-store-debug-logs"
+           value="Store Debug Logs">
     <label for="chromeos-view-store-debug-logs"
            id="chromeos-view-store-debug-logs-status">
     </label>
   </div>
   <div id="chromeos-view-network-debugging-div">
     <h3>Network Debugging</h3>
     <dl>
       <dt>Select interface for debugging</dt>
       <dd>
         <input type="button"
                value="Wi-Fi"
                id="chromeos-view-network-debugging-wifi">
         <input type="button"
                value="Ethernet"
                id="chromeos-view-network-debugging-ethernet">
         <input type="button"
                value="Cellular"
                id="chromeos-view-network-debugging-cellular">
         <input type="button"
+               value="WiMAX"
+               id="chromeos-view-network-debugging-wimax">
+        <input type="button"
                name="subsystem"
                value="None"
                id="chromeos-view-network-debugging-none">
       </dd>
     </dl>
     <label id="chromeos-view-network-debugging-status">
     </label>
   </div>
 </div>