Ensure History > Recent Tabs restore preserves window disposition.

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>
 
@@ skipping 21 matching lines @@
 
   // 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;
+  const gfx::Rect GetRestoredBounds() const override;
+  ui::WindowShowState GetRestoredState() const override;
+  std::string GetWorkspace() 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;
@@ skipping 10 matching lines @@
   // 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_