Save and restore State for ShellWindows, including panels

chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.mm

Index: chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.mm b/chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.mm
index 21dbb2dcc779fd98077ae656178f95ebeaa4dc72..34dbc598dc4747a6acaa0a9d934be3f9565a58e2 100644
--- a/chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.mm
+++ b/chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.mm
@@ -394,6 +394,10 @@ bool NativeAppWindowCocoa::IsFullscreenOrPending() const {
   return is_fullscreen_;
 }
 
+bool NativeAppWindowCocoa::IsDetached() const {
+  return false;
+}
+
 gfx::NativeWindow NativeAppWindowCocoa::GetNativeWindow() {
   return window();
 }
@@ -407,6 +411,12 @@ gfx::Rect NativeAppWindowCocoa::GetRestoredBounds() const {
   return bounds;
 }
 
+ui::WindowShowState NativeAppWindowCocoa::GetRestoredState() const {
+  if (IsMaximized())
+    return ui::SHOW_STATE_MAXIMIZED;
+  return ui::SHOW_STATE_NORMAL;
+}
+
 gfx::Rect NativeAppWindowCocoa::GetBounds() const {
   return GetRestoredBounds();
 }