Replace Label::Alignment with gfx::HorizontalAlignment

ui/views/controls/button/label_button.h

Index: ui/views/controls/button/label_button.h
diff --git a/ui/views/controls/button/label_button.h b/ui/views/controls/button/label_button.h
index 258f1a69470dc21ee479f9c49db93b065c48b58d..e328dc514dcb606a33535e3c3b7c68f61ef4cbe2 100644
--- a/ui/views/controls/button/label_button.h
+++ b/ui/views/controls/button/label_button.h
@@ -45,8 +45,8 @@ class VIEWS_EXPORT LabelButton : public CustomButton,
 
   // Get or set the horizontal alignment used for the button.
   // The optional image will lead the text, unless the button is right-aligned.
-  Label::Alignment GetHorizontalAlignment() const;
-  void SetHorizontalAlignment(Label::Alignment alignment);
+  gfx::HorizontalAlignment GetHorizontalAlignment() const;
+  void SetHorizontalAlignment(gfx::HorizontalAlignment alignment);
 
   // Call set_min_size(gfx::Size()) to clear the monotonically increasing size.
   void set_min_size(const gfx::Size& min_size) { min_size_ = min_size; }