Save and restore State for ShellWindows, including panels

chrome/browser/ui/extensions/shell_window.h

Index: chrome/browser/ui/extensions/shell_window.h
diff --git a/chrome/browser/ui/extensions/shell_window.h b/chrome/browser/ui/extensions/shell_window.h
index 7b28a5cd5cacb26bc595aad5fc84a48e160994a9..05b06ab03c946e779fc30fa2db09ea4c08a32961 100644
--- a/chrome/browser/ui/extensions/shell_window.h
+++ b/chrome/browser/ui/extensions/shell_window.h
@@ -15,6 +15,7 @@
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/console_message_level.h"
+#include "ui/base/ui_base_types.h"  // WindowShowState
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/rect.h"
 
@@ -102,15 +103,8 @@ class ShellWindow : public content::NotificationObserver,
     // The process ID of the process that requested the create.
     int32 creator_process_id;
 
-    enum State {
-      STATE_NORMAL,
-      STATE_FULLSCREEN,
-      STATE_MAXIMIZED,
-      STATE_MINIMIZED
-    };
-
     // Initial state of the window.
-    State state;
+    ui::WindowShowState state;
 
     // If true, don't show the window after creation.
     bool hidden;