[sessions] Properly namespace recently-componentized TabRestore code

chrome/browser/sessions/chrome_tab_restore_service_client.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 CHROME_BROWSER_SESSIONS_CHROME_TAB_RESTORE_SERVICE_CLIENT_H_
 #define CHROME_BROWSER_SESSIONS_CHROME_TAB_RESTORE_SERVICE_CLIENT_H_
 
 #include "base/basictypes.h"
 #include "components/sessions/core/tab_restore_service_client.h"
 
 class Profile;
 
 // ChromeTabRestoreServiceClient provides an implementation of
 // TabRestoreServiceClient that depends on chrome/.
 class ChromeTabRestoreServiceClient : public sessions::TabRestoreServiceClient {
  public:
   explicit ChromeTabRestoreServiceClient(Profile* profile);
   ~ChromeTabRestoreServiceClient() override;
 
  private:
   // TabRestoreServiceClient:
-  TabRestoreServiceDelegate* CreateTabRestoreServiceDelegate(
+  sessions::TabRestoreServiceDelegate* CreateTabRestoreServiceDelegate(
       int host_desktop_type,
       const std::string& app_name) override;
-  TabRestoreServiceDelegate* FindTabRestoreServiceDelegateForTab(
+  sessions::TabRestoreServiceDelegate* FindTabRestoreServiceDelegateForTab(
       const sessions::LiveTab* tab) override;
-  TabRestoreServiceDelegate* FindTabRestoreServiceDelegateWithID(
+  sessions::TabRestoreServiceDelegate* FindTabRestoreServiceDelegateWithID(
       SessionID::id_type desired_id,
       int host_desktop_type) override;
   bool ShouldTrackURLForRestore(const GURL& url) override;
   std::string GetExtensionAppIDForTab(sessions::LiveTab* tab) override;
   scoped_ptr<sessions::TabClientData> GetTabClientDataForTab(
       sessions::LiveTab* tab) override;
   base::SequencedWorkerPool* GetBlockingPool() override;
   base::FilePath GetPathToSaveTo() override;
   GURL GetNewTabURL() override;
   bool HasLastSession() override;
   void GetLastSession(const sessions::GetLastSessionCallback& callback,
                       base::CancelableTaskTracker* tracker) override;
   void OnTabRestored(const GURL& url) override;
 
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeTabRestoreServiceClient);
 };
 
 #endif  // CHROME_BROWSER_SESSIONS_CHROME_TAB_RESTORE_SERVICE_CLIENT_H_