[DevTools] Protocol version 1.2.

chrome/test/data/extensions/api_test/debugger_extension/background.js

 // Copyright (c) 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.
 
 var pass = chrome.test.callbackPass;
 var fail = chrome.test.callbackFail;
 
 var debuggee;
-var protocolVersion = "1.1";
+var protocolVersion = "1.2";
 
 chrome.test.runTests([
 
   function attach() {
     var extensionId = chrome.extension.getURL('').split('/')[2];
     debuggee = {extensionId: extensionId};
     chrome.debugger.attach(debuggee, protocolVersion, pass());
   },
 
   function attachToMissing() {
@@ skipping 44 matching lines @@
         if (page) {
           chrome.debugger.attach({targetId: page.id}, protocolVersion, pass());
         } else {
           chrome.test.fail("Cannot discover a newly created worker");
         }
       });
     };
     workerPort.start();
   }
 ]);