Refactoring of SessionService to get componentized.

chrome/browser/sessions/session_service_utils.h

+// Copyright 2014 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_SESSION_SERVICE_UTILS_H_
+#define CHROME_BROWSER_SESSIONS_SESSION_SERVICE_UTILS_H_
+
+#include "chrome/browser/sessions/session_types.h"
+#include "chrome/browser/ui/browser.h"
+
+// Used to distinguish an application from a ordinary content window.
+enum AppType {
+  TYPE_APP,
+  TYPE_NORMAL
+};
+
+// Returns true if a window of given |window_type| and |app_type| should get
+// restored upon session restore.
+bool ShouldRestoreWindowOfType(SessionWindow::WindowType type,
+                               AppType app_type);
+
+// Removes unrestorable windows from the previous windows list.
+void RemoveUnusedRestoreWindows(std::vector<SessionWindow*>* window_list);
+
+// Convert back/forward between the Browser and SessionService window types.
+SessionWindow::WindowType WindowTypeForBrowserType(Browser::Type type);
+Browser::Type BrowserTypeForWindowType(SessionWindow::WindowType type);
+
+#endif  // CHROME_BROWSER_SESSIONS_SESSION_SERVICE_UTILS_H_