Upstream Chrome on iOS source code [2/11].

ios/chrome/browser/sessions/tab_restore_service_delegate_impl_ios.h

+// Copyright 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.
+
+#ifndef IOS_CHROME_BROWSER_SESSIONS_TAB_RESTORE_SERVICE_DELEGATE_IMPL_IOS_H_
+#define IOS_CHROME_BROWSER_SESSIONS_TAB_RESTORE_SERVICE_DELEGATE_IMPL_IOS_H_
+
+#include <string>
+#include <vector>
+
+#include "base/macros.h"
+#include "components/keyed_service/core/keyed_service.h"
+#include "components/sessions/core/live_tab_context.h"
+
+@class TabModel;
+
+namespace ios {
+class ChromeBrowserState;
+}
+
+// Implementation of sessions::LiveTabContext which uses an instance
+// of TabModel in order to fulfil its duties.
+class TabRestoreServiceDelegateImplIOS : public sessions::LiveTabContext,
+                                         public KeyedService {
+ public:
+  explicit TabRestoreServiceDelegateImplIOS(
+      ios::ChromeBrowserState* browser_state);
+  ~TabRestoreServiceDelegateImplIOS() override;
+
+  // Overridden from KeyedService:
+  void Shutdown() override {}
+
+  // Overridden from sessions::LiveTabContext:
+  void ShowBrowserWindow() override;
+  const SessionID& GetSessionID() const override;
+  int GetTabCount() const override;
+  int GetSelectedIndex() const override;
+  std::string GetAppName() const override;
+  sessions::LiveTab* GetLiveTabAt(int index) const override;
+  sessions::LiveTab* GetActiveLiveTab() const override;
+  bool IsTabPinned(int index) const override;
+  sessions::LiveTab* AddRestoredTab(
+      const std::vector<sessions::SerializedNavigationEntry>& navigations,
+      int tab_index,
+      int selected_navigation,
+      const std::string& extension_app_id,
+      bool select,
+      bool pin,
+      bool from_last_session,
+      const sessions::PlatformSpecificTabData* tab_platform_data,
+      const std::string& user_agent_override) override;
+  sessions::LiveTab* ReplaceRestoredTab(
+      const std::vector<sessions::SerializedNavigationEntry>& navigations,
+      int selected_navigation,
+      bool from_last_session,
+      const std::string& extension_app_id,
+      const sessions::PlatformSpecificTabData* tab_platform_data,
+      const std::string& user_agent_override) override;
+  void CloseTab() override;
+
+ private:
+  // Retrieves the current |TabModel| corresponding to |browser_state_|;
+  TabModel* tab_model() const;
+
+  ios::ChromeBrowserState* browser_state_;  // weak
+  SessionID session_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(TabRestoreServiceDelegateImplIOS);
+};
+
+#endif  // IOS_CHROME_BROWSER_SESSIONS_TAB_RESTORE_SERVICE_DELEGATE_IMPL_IOS_H_