NativeWidgetViews: Implement Maximize.

views/widget/native_widget_views.h

Index: views/widget/native_widget_views.h
diff --git a/views/widget/native_widget_views.h b/views/widget/native_widget_views.h
index 3a0d00409e7f85ce3989084059b1875ef3630745..6dcef52ff1722c69135641fd9c257740d79704a1 100644
--- a/views/widget/native_widget_views.h
+++ b/views/widget/native_widget_views.h
@@ -9,6 +9,7 @@
 #include <map>
 
 #include "base/message_loop.h"
+#include "ui/base/ui_base_types.h"
 #include "ui/gfx/transform.h"
 #include "views/widget/native_widget_private.h"
 #include "views/widget/widget.h"
@@ -155,7 +156,7 @@ class VIEWS_EXPORT NativeWidgetViews : public internal::NativeWidgetPrivate {
 
   bool active_;
 
-  bool minimized_;
+  ui::WindowShowState window_state_;
 
   // Set when SetAlwaysOnTop is called, or keep_on_top is set during creation.
   bool always_on_top_;