Decouple TabRestoreService from Browser

chrome/browser/sessions/tab_restore_service_delegate.h

+// Copyright (c) 2011 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_TAB_RESTORE_SERVICE_DELEGATE_H_
+#define CHROME_BROWSER_SESSIONS_TAB_RESTORE_SERVICE_DELEGATE_H_
+
+#include <string>
+#include <vector>
+
+#include "chrome/browser/sessions/session_id.h"
+
+class Profile;
+class SessionStorageNamespace;
+class TabContents;
+class TabNavigation;
+
+// Objects implement this interface to provide necessary functionality for
+// TabRestoreService to operate. These methods are mostly copies of existing
+// Browser methods.
+class TabRestoreServiceDelegate {
+ public:
+  // see BrowserWindow::Show()
+  virtual void ShowBrowserWindow() = 0;
+
+  // see Browser::session_id()
+  virtual const SessionID& GetSessionID() const = 0;
+
+  // see Browser::tab_count()
+  virtual int GetTabCount() const = 0;
+
+  // see Browser::selected_index()
+  virtual int GetSelectedIndex() const = 0;
+
+  // see Browser methods with the same names
+  virtual TabContents* GetTabContentsAt(int index) const = 0;
+  virtual TabContents* GetSelectedTabContents() const = 0;
+  virtual bool IsTabPinned(int index) const = 0;
+  virtual TabContents* AddRestoredTab(
+      const std::vector<TabNavigation>& navigations,
+      int tab_index,
+      int selected_navigation,
+      const std::string& extension_app_id,
+      bool select,
+      bool pin,
+      bool from_last_session,
+      SessionStorageNamespace* storage_namespace) = 0;
+  virtual void ReplaceRestoredTab(
+      const std::vector<TabNavigation>& navigations,
+      int selected_navigation,
+      bool from_last_session,
+      const std::string& extension_app_id,
+      SessionStorageNamespace* session_storage_namespace) = 0;
+  virtual void CloseTab() = 0;
+
+  // see Browser::Create
+  static TabRestoreServiceDelegate* Create(Profile* profile);
+
+  // see BrowserList::GetBrowserForController
+  static TabRestoreServiceDelegate* FindDelegateForController(
+      const NavigationController* controller,
+      int* index);
+
+  // see BrowserList::FindBrowserWithID
+  static TabRestoreServiceDelegate* FindDelegateWithID(
+      SessionID::id_type desired_id);
+
+ protected:
+  virtual ~TabRestoreServiceDelegate() {}
+};
+
+#endif  // CHROME_BROWSER_SESSIONS_TAB_RESTORE_SERVICE_DELEGATE_H_