linux_aura: Fixes a couple of issues with the button border integration.

ui/views/controls/button/button.h

Index: ui/views/controls/button/button.h
diff --git a/ui/views/controls/button/button.h b/ui/views/controls/button/button.h
index 0e3f805ee47500be0dae83be7919861bc2afd7bd..d48850c6bcbd336351583d0acece402dabc8818d 100644
--- a/ui/views/controls/button/button.h
+++ b/ui/views/controls/button/button.h
@@ -5,6 +5,7 @@
 #ifndef UI_VIEWS_CONTROLS_BUTTON_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_BUTTON_H_
 
+#include "ui/native_theme/native_theme.h"
 #include "ui/views/view.h"
 
 namespace views {
@@ -45,6 +46,8 @@ class VIEWS_EXPORT Button : public View {
     STYLE_COUNT,
   };
 
+  static ButtonState GetButtonStateFrom(ui::NativeTheme::State state);
+
   void SetTooltipText(const base::string16& tooltip_text);
 
   int tag() const { return tag_; }