Revert of chromeos: Convert ash VPNDelegate interface to mojo

ash/common/system/chromeos/network/vpn_delegate.h

Index: ash/common/system/chromeos/network/vpn_delegate.h
diff --git a/ash/common/system/chromeos/network/vpn_delegate.h b/ash/common/system/chromeos/network/vpn_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..d16f0cac48314d6a75042feb9026680680a53df1
--- /dev/null
+++ b/ash/common/system/chromeos/network/vpn_delegate.h
@@ -0,0 +1,102 @@
+// Copyright 2015 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.
+
+#ifndef ASH_COMMON_SYSTEM_CHROMEOS_NETWORK_VPN_DELEGATE_H_
+#define ASH_COMMON_SYSTEM_CHROMEOS_NETWORK_VPN_DELEGATE_H_
+
+#include <string>
+#include <vector>
+
+#include "ash/ash_export.h"
+#include "base/macros.h"
+#include "base/observer_list.h"
+
+namespace ash {
+
+// Describes a VPN provider.
+struct ASH_EXPORT VPNProvider {
+  // Constructs the built-in VPN provider.
+  VPNProvider();
+
+  // Constructs a third-party VPN provider.
+  VPNProvider(const std::string& extension_id,
+              const std::string& third_party_provider_name);
+
+  bool operator==(const VPNProvider& other) const;
+
+  // Whether this key represents a built-in or third-party VPN provider.
+  bool third_party;
+
+  // ID of the extension that implements this provider. Used for third-party
+  // VPN providers only.
+  std::string extension_id;
+
+  // Human-readable name if |third_party| is true, otherwise empty.
+  std::string third_party_provider_name;
+};
+
+// This delegate provides UI code in ash, e.g. |VPNListView|, with access to the
+// list of VPN providers enabled in the primary user's profile. The delegate
+// furthermore allows the UI code to request that a VPN provider show its "add
+// network" dialog.
+// TODO(jamescook): Rename this to VpnList as part of mojo conversion because it
+// won't be a delegate anymore.
+class ASH_EXPORT VPNDelegate {
+ public:
+  // An observer that is notified whenever the list of VPN providers enabled in
+  // the primary user's profile changes.
+  class Observer {
+   public:
+    virtual void OnVPNProvidersChanged() = 0;
+
+   protected:
+    virtual ~Observer();
+
+   private:
+    DISALLOW_ASSIGN(Observer);
+  };
+
+  VPNDelegate();
+  virtual ~VPNDelegate();
+
+  const std::vector<VPNProvider>& vpn_providers() { return vpn_providers_; }
+
+  // Returns |true| if at least one third-party VPN provider is enabled in the
+  // primary user's profile, in addition to the built-in OpenVPN/L2TP provider.
+  bool HaveThirdPartyVPNProviders() const;
+
+  // Requests that the third-party VPN provider identified by |extension_id|
+  // show its "add network" dialog. If |extension_id| is empty then the built-in
+  // VPN provider's dialog is shown.
+  virtual void ShowAddPage(const std::string& extension_id) = 0;
+
+  void AddObserver(Observer* observer);
+  void RemoveObserver(Observer* observer);
+
+  // Sets the list of extension-backed VPN providers. The list may be empty.
+  // Notifies observers. Public for testing.
+  // TODO(jamescook): Convert to mojo interface.
+  void SetThirdPartyVpnProviders(
+      const std::vector<VPNProvider>& third_party_providers);
+
+ private:
+  // Notify observers that the list of VPN providers enabled in the primary
+  // user's profile has changed.
+  void NotifyObservers();
+
+  // Adds the built-in OpenVPN/L2TP provider to |vpn_providers_|.
+  void AddBuiltInProvider();
+
+  // Cache of VPN providers, including the built-in OpenVPN/L2TP provider and
+  // other providers added by extensions in the primary user's profile.
+  std::vector<VPNProvider> vpn_providers_;
+
+  base::ObserverList<Observer> observer_list_;
+
+  DISALLOW_COPY_AND_ASSIGN(VPNDelegate);
+};
+
+}  // namespace ash
+
+#endif  // ASH_COMMON_SYSTEM_CHROMEOS_NETWORK_VPN_DELEGATE_H_