Return webcontents and add in test.

chrome/browser/ui/browser_tabrestore.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_TABRESTORE_H_
 #define CHROME_BROWSER_UI_BROWSER_TABRESTORE_H_
 
 #include <vector>
 
 #include "chrome/browser/sessions/session_types.h"
@@ skipping 13 matching lines @@
 
 // Add a tab with its session history restored from the SessionRestore
 // system. If select is true, the tab is selected. |tab_index| gives the index
 // to insert the tab at. |selected_navigation| is the index of the
 // SerializedNavigationEntry in |navigations| to select. If |extension_app_id|
 // is non-empty the tab is an app tab and |extension_app_id| is the id of the
 // extension. If |pin| is true and |tab_index|/ is the last pinned tab, then
 // the newly created tab is pinned. If |from_last_session| is true,
 // |navigations| are from the previous session. |user_agent_override| contains
 // the string being used as the user agent for all of the tab's navigations when
-// the regular user agent is overridden.
+// the regular user agent is overridden. Returns the WebContents of the restored
+// tab.
 content::WebContents* AddRestoredTab(
     Browser* browser,
     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,
     content::SessionStorageNamespace* storage_namespace,
     const std::string& user_agent_override);
 
 // Replaces the state of the currently selected tab with the session
-// history restored from the SessionRestore system.
-void ReplaceRestoredTab(
+// history restored from the SessionRestore system. Returns the WebContents of
+// the restored tab.
+content::WebContents* ReplaceRestoredTab(
     Browser* browser,
     const std::vector<sessions::SerializedNavigationEntry>& navigations,
     int selected_navigation,
     bool from_last_session,
     const std::string& extension_app_id,
     content::SessionStorageNamespace* session_storage_namespace,
     const std::string& user_agent_override);
 
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_BROWSER_TABRESTORE_H_