Adds a method to query the nacl architecture in the hangout services extension.

chrome/browser/resources/hangout_services/thunk.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 chrome.runtime.onStartup.addListener(
     function() {
   chrome.alarms.create('hangout_services_fxpre', {'delayInMinutes': 2});
 });
 
 chrome.alarms.onAlarm.addListener(function(alarm) {
@@ skipping 101 matching lines @@
       return true;
     } else if (method == 'isExtensionEnabled') {
       // This method is necessary because there may be more than one
       // version of this extension, under different extension IDs. By
       // first calling this method on the extension ID, the client can
       // check if it's loaded; if it's not, the extension system will
       // call the callback with no arguments and set
       // chrome.runtime.lastError.
       doSendResponse();
       return false;
+    } else if (method == 'getNaclArchitecture') {
+      chrome.runtime.getPlatformInfo(function(obj) {
+        doSendResponse(obj.nacl_arch);
+      });
+      return true;
     }
     throw new Error('Unknown method: ' + method);
   } catch (e) {
     doSendResponse(null, e.name + ': ' + e.message);
   }
 });
 
 // If Hangouts connects with a port named 'onSinksChangedListener', we
 // will register a listener and send it a message {'eventName':
 // 'onSinksChanged'} whenever the event fires.
 chrome.runtime.onConnectExternal.addListener(
     function(port) {
   if (port.name == 'onSinksChangedListener') {
     function clientListener() {
       port.postMessage({'eventName': 'onSinksChanged'});
     }
     chrome.webrtcAudioPrivate.onSinksChanged.addListener(clientListener);
 
     port.onDisconnect(function() {
         chrome.webrtcAudioPrivate.onSinksChanged.removeListener(
             clientListener);
       });
   }
 });