[sessions] Properly namespace recently-componentized TabRestore code

chrome/browser/ui/browser_tab_restore_service_delegate.cc

 // 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.
 
 #include "chrome/browser/ui/browser_tab_restore_service_delegate.h"
 
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_tabrestore.h"
@@ skipping 84 matching lines @@
       extension_app_id, storage_namespace, user_agent_override);
 
   return sessions::ContentLiveTab::FromWebContents(web_contents);
 }
 
 void BrowserTabRestoreServiceDelegate::CloseTab() {
   chrome::CloseTab(browser_);
 }
 
 // static
-TabRestoreServiceDelegate* BrowserTabRestoreServiceDelegate::Create(
+sessions::TabRestoreServiceDelegate* BrowserTabRestoreServiceDelegate::Create(
     Profile* profile,
     chrome::HostDesktopType host_desktop_type,
     const std::string& app_name) {
   Browser* browser;
   if (app_name.empty()) {
     browser = new Browser(Browser::CreateParams(profile, host_desktop_type));
   } else {
     // Only trusted app popup windows should ever be restored.
     browser = new Browser(
         Browser::CreateParams::CreateForApp(
             app_name, true /* trusted_source */, gfx::Rect(), profile,
             host_desktop_type));
   }
   if (browser)
     return browser->tab_restore_service_delegate();
   else
     return NULL;
 }
 
 // static
-TabRestoreServiceDelegate*
+sessions::TabRestoreServiceDelegate*
 BrowserTabRestoreServiceDelegate::FindDelegateForWebContents(
     const WebContents* contents) {
   Browser* browser = chrome::FindBrowserWithWebContents(contents);
   return browser ? browser->tab_restore_service_delegate() : nullptr;
 }
 
 // static
-TabRestoreServiceDelegate* BrowserTabRestoreServiceDelegate::FindDelegateWithID(
+sessions::TabRestoreServiceDelegate*
+BrowserTabRestoreServiceDelegate::FindDelegateWithID(
     SessionID::id_type desired_id,
     chrome::HostDesktopType host_desktop_type) {
   Browser* browser = chrome::FindBrowserWithID(desired_id);
   return (browser && browser->host_desktop_type() == host_desktop_type) ?
              browser->tab_restore_service_delegate() : NULL;
 }