[NetworkChangeNotifier] Run Windows connection type computation on other thread

net/base/network_change_notifier_win_unittest.cc

 // Copyright (c) 2012 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 "net/base/network_change_notifier_win.h"
+
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
+#include "base/single_thread_task_runner.h"
 #include "net/base/network_change_notifier.h"
 #include "net/base/network_change_notifier_factory.h"
-#include "net/base/network_change_notifier_win.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::AtLeast;
 using ::testing::Invoke;
 using ::testing::Return;
 using ::testing::StrictMock;
 
 namespace net {
 
@@ skipping 11 matching lines @@
     set_is_watching(false);
   }
 
   // From NetworkChangeNotifierWin.
   NetworkChangeNotifier::ConnectionType RecomputeCurrentConnectionType()
       const override {
     return NetworkChangeNotifier::CONNECTION_UNKNOWN;
   }
 
   // From NetworkChangeNotifierWin.
+  void RecomputeCurrentConnectionTypeOnDnsThread(
+      base::Callback<void(ConnectionType)> reply_callback) const override {
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
+        FROM_HERE,
+        base::Bind(reply_callback, NetworkChangeNotifier::CONNECTION_UNKNOWN));
+  }
+
+  // From NetworkChangeNotifierWin.
   MOCK_METHOD0(WatchForAddressChangeInternal, bool());
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestNetworkChangeNotifierWin);
 };
 
 class TestIPAddressObserver : public NetworkChangeNotifier::IPAddressObserver {
  public:
   TestIPAddressObserver() {
     NetworkChangeNotifier::AddIPAddressObserver(this);
@@ skipping 201 matching lines @@
 }
 
 TEST_F(NetworkChangeNotifierWinTest, NetChangeWinFailSignalTwice) {
   StartWatchingAndSucceed();
   SignalAndFail();
   RetryAndFail();
   RetryAndSucceed();
 }
 
 }  // namespace net