[sessions] Properly namespace recently-componentized TabRestore code

chrome/browser/ui/browser_tab_restore_service_delegate.h

 // Copyright (c) 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 CHROME_BROWSER_UI_BROWSER_TAB_RESTORE_SERVICE_DELEGATE_H_
 #define CHROME_BROWSER_UI_BROWSER_TAB_RESTORE_SERVICE_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "components/sessions/core/tab_restore_service_delegate.h"
 
 class Browser;
 class Profile;
 
 namespace content {
 class WebContents;
 }
 
 // Implementation of TabRestoreServiceDelegate which uses an instance of
 // Browser in order to fulfil its duties.
-class BrowserTabRestoreServiceDelegate : public TabRestoreServiceDelegate {
+class BrowserTabRestoreServiceDelegate
+    : public sessions::TabRestoreServiceDelegate {
  public:
   explicit BrowserTabRestoreServiceDelegate(Browser* browser)
       : browser_(browser) {}
   ~BrowserTabRestoreServiceDelegate() override {}
 
   // Overridden from TabRestoreServiceDelegate:
   void ShowBrowserWindow() override;
   const SessionID& GetSessionID() const override;
   int GetTabCount() const override;
   int GetSelectedIndex() const override;
@@ skipping 14 matching lines @@
   sessions::LiveTab* ReplaceRestoredTab(
       const std::vector<sessions::SerializedNavigationEntry>& navigations,
       int selected_navigation,
       bool from_last_session,
       const std::string& extension_app_id,
       const sessions::TabClientData* tab_client_data,
       const std::string& user_agent_override) override;
   void CloseTab() override;
 
   // see Browser::Create
-  static TabRestoreServiceDelegate* Create(
+  static sessions::TabRestoreServiceDelegate* Create(
       Profile* profile,
       chrome::HostDesktopType host_desktop_type,
       const std::string& app_name);
 
   // see browser::FindBrowserForWebContents
-  static TabRestoreServiceDelegate* FindDelegateForWebContents(
+  static sessions::TabRestoreServiceDelegate* FindDelegateForWebContents(
       const content::WebContents* contents);
 
   // see chrome::FindBrowserWithID
   // Returns the TabRestoreServiceDelegate of the Browser with |desired_id| if
   // such a Browser exists and is on the desktop defined by |host_desktop_type|.
-  static TabRestoreServiceDelegate* FindDelegateWithID(
+  static sessions::TabRestoreServiceDelegate* FindDelegateWithID(
       SessionID::id_type desired_id,
       chrome::HostDesktopType host_desktop_type);
 
  private:
   Browser* browser_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserTabRestoreServiceDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_TAB_RESTORE_SERVICE_DELEGATE_H_