Update NetLog to be thread safe.

chrome/browser/net/connection_tester_unittest.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/net/connection_tester.h"
 
 #include "chrome/browser/io_thread.h"
 #include "chrome/test/testing_pref_service.h"
 #include "net/base/mock_host_resolver.h"
 #include "net/test/test_server.h"
@@ skipping 60 matching lines @@
 //   - Making sure each test has an IO loop running
 //   - Catching any host resolve requests and mapping them to localhost
 //     (so the test doesn't use any external network dependencies).
 class ConnectionTesterTest : public PlatformTest {
  public:
   ConnectionTesterTest()
       : test_server_(net::TestServer::TYPE_HTTP,
             FilePath(FILE_PATH_LITERAL("net/data/url_request_unittest"))),
         message_loop_(MessageLoop::TYPE_IO),
         pref_service(new TestingPrefService()),
-        io_thread_(pref_service.get()) {
+        io_thread_(pref_service.get(), NULL) {
     scoped_refptr<net::RuleBasedHostResolverProc> catchall_resolver(
         new net::RuleBasedHostResolverProc(NULL));
 
     catchall_resolver->AddRule("*", "127.0.0.1");
 
     scoped_host_resolver_proc_.Init(catchall_resolver);
   }
 
  protected:
   net::ScopedDefaultHostResolverProc scoped_host_resolver_proc_;
@@ skipping 55 matching lines @@
   // net::ClientSocketPoolBaseHelper, since the "Group" holds a pointer
   // |backup_task| that it will try to deref during the destructor, but
   // depending on the order that pending tasks were deleted in, it might
   // already be invalid! See http://crbug.com/43291.
   MessageLoop::current()->PostTask(FROM_HERE, new MessageLoop::QuitTask());
   MessageLoop::current()->Run();
 }
 
 }  // namespace