Turn on session restore by default for mac on Lion

chrome/browser/ui/cocoa/window_restore_utils.h

Index: chrome/browser/ui/cocoa/window_restore_utils.h
diff --git a/chrome/browser/ui/cocoa/window_restore_utils.h b/chrome/browser/ui/cocoa/window_restore_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..dbb903cb4bc1a7cc3930b57ac058e6f58183ac3f
--- /dev/null
+++ b/chrome/browser/ui/cocoa/window_restore_utils.h
@@ -0,0 +1,16 @@
+// 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_UI_COCOA_WINDOW_RESTORE_UTILS_H_
+#define CHROME_BROWSER_UI_COCOA_WINDOW_RESTORE_UTILS_H_
+
+namespace restore_utils {
+
+// On Lion or later, returns |true| if the System Preference
+// "Restore windows..." option is checked.  Other OSes will return |false|.
+bool IsWindowRestoreEnabled();
+
+}  // namespace restore_utils
+
+#endif  // CHROME_BROWSER_UI_COCOA_WINDOW_RESTORE_UTILS_H_