Reland: chromeos: Convert ash VPNDelegate interface to mojo

ash/common/system/chromeos/network/vpn_delegate_unittest.cc

-// Copyright 2016 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 "ash/common/system/chromeos/network/vpn_delegate.h"
-
-#include <algorithm>
-#include <vector>
-
-#include "base/macros.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace ash {
-
-namespace {
-
-class TestVpnDelegate : public VPNDelegate {
- public:
-  TestVpnDelegate() {}
-  ~TestVpnDelegate() override {}
-
-  // VPNDelegate:
-  void ShowAddPage(const std::string& extension_id) override {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(TestVpnDelegate);
-};
-
-}  // namespace
-
-using VpnDelegateTest = testing::Test;
-
-TEST_F(VpnDelegateTest, BuiltInProvider) {
-  TestVpnDelegate delegate;
-
-  // The VPN list should only contain the built-in provider.
-  ASSERT_EQ(1u, delegate.vpn_providers().size());
-  VPNProvider provider = delegate.vpn_providers()[0];
-  EXPECT_FALSE(provider.third_party);
-  EXPECT_TRUE(provider.extension_id.empty());
-}
-
-TEST_F(VpnDelegateTest, ThirdPartyProviders) {
-  TestVpnDelegate delegate;
-
-  // The VPN list should only contain the built-in provider.
-  EXPECT_EQ(1u, delegate.vpn_providers().size());
-
-  // Add some third party (extension-backed) providers.
-  VPNProvider provider1("extension_id1", "name1");
-  VPNProvider provider2("extension_id2", "name2");
-  std::vector<VPNProvider> third_party_providers = {provider1, provider2};
-  delegate.SetThirdPartyVpnProviders(third_party_providers);
-
-  // List contains the extension-backed providers. Order doesn't matter.
-  std::vector<VPNProvider> providers = delegate.vpn_providers();
-  EXPECT_EQ(3u, providers.size());
-  EXPECT_EQ(1u, std::count(providers.begin(), providers.end(), provider1));
-  EXPECT_EQ(1u, std::count(providers.begin(), providers.end(), provider2));
-}
-
-}  // namespace ash