mash: Move SystemTrayDelegate and dependencies to //ash/common

ash/networking_config_delegate.h

-// 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_NETWORKING_CONFIG_DELEGATE_H_
-#define ASH_NETWORKING_CONFIG_DELEGATE_H_
-
-#include <memory>
-#include <string>
-
-#include "ash/ash_export.h"
-#include "base/macros.h"
-
-namespace ash {
-
-// This delegate allows the UI code in ash, e.g. |NetworkStateListDetailedView|,
-// to access the |NetworkingConfigService| in order to determine whether the
-// configuration of a network identified by its |service_path| is controlled by
-// an extension.
-class NetworkingConfigDelegate {
- public:
-  // A struct that provides information about the extension controlling the
-  // configuration of a network.
-  struct ASH_EXPORT ExtensionInfo {
-    ExtensionInfo(const std::string& id, const std::string& name);
-    ~ExtensionInfo();
-    std::string extension_id;
-    std::string extension_name;
-  };
-
-  virtual ~NetworkingConfigDelegate() {}
-
-  // Returns information about the extension registered to control configuration
-  // of the network |service_path|. If no extension is registered, the
-  // scoped_ptr is empty.
-  virtual std::unique_ptr<const ExtensionInfo> LookUpExtensionForNetwork(
-      const std::string& service_path) = 0;
-
- private:
-  DISALLOW_ASSIGN(NetworkingConfigDelegate);
-};
-
-}  // namespace ash
-
-#endif  // ASH_NETWORKING_CONFIG_DELEGATE_H_