Rename methods and members and const variables to alternative service.

chrome/browser/resources/net_internals/quic_view.html

 <div id=quic-view-tab-content class=content-box>
   <ul style='margin-top:0'>
     <li>QUIC Enabled: <span jscontent="!!quic_enabled"></span></li>
-    <li>Alternate Protocol Probability Threshold: <span jscontent="alternate_protocol_probability_threshold"></span></li>
+    <li>Alternative Service Probability Threshold: <span jscontent="alternative_service_probability_threshold"></span></li>

[eroman, 2015/04/23 20:04:11]

This is going to affect loading of older log files in the newer UI.

Can you use a solution similar to what you did for alternate_protocol:

https://chromium.googlesource.com/chromium/src.git/+/00e45adb7d8edc7685a5f7e3...

In other words, check for both the old and new property, and add a comment
indicating when it is safe to drop support for the old property.

[Bence, 2015/04/24 14:24:59]

Done.

     <li>Origin To Force QUIC On: <span jscontent="origin_to_force_quic_on"></span></li>
     <li>QUIC connection options: <span jscontent="connection_options"></span></li>
     <li>Consistent Port Selection Enabled: <span jscontent="!!enable_quic_port_selection"></span></li>
   </ul>
 
   <h4>QUIC sessions</h4>
     <!-- Only one of these two are shown -->
     <div jsdisplay="!($this.sessions && sessions.length > 0)">None</div>
     <div jsdisplay="$this.sessions && sessions.length > 0">
       <a href="#events&q=type:QUIC_SESSION%20is:active">View live QUIC sessions</a>
@@ skipping 28 matching lines @@
               <td jscontent="packets_sent"></td>
               <td jscontent="packets_lost"></td>
               <td jscontent="packets_received"></td>
               <td jscontent="connected"></td>
             </tr>
           </tbody>
         </table>
       </p>
     </div>
 </div>