views: Switch Checkbox over to LabelButton.

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 8164be2a23836e4ba6c6fe36d1b772447796a32f..0b209abf159f2c916239d50f461bb0373d5d5c42 100644
--- a/ui/views/controls/button/button.h
+++ b/ui/views/controls/button/button.h
@@ -29,7 +29,6 @@ class VIEWS_EXPORT Button : public View {
   virtual ~Button();
 
   // Button states for various button sub-types.
-  // TODO(msw): Add toggled state for checkboxes, radio buttons, etc.
   enum ButtonState {
     STATE_NORMAL = 0,
     STATE_HOVERED,
@@ -39,7 +38,7 @@ class VIEWS_EXPORT Button : public View {
   };
 
   // Button styles with associated images and border painters.
-  // TODO(msw): Add "Blue Button", Checkbox, Radio, Menu, ComboBox, etc.
+  // TODO(msw): Add "Blue Button", Menu, ComboBox, etc.
   enum ButtonStyle {
     STYLE_BUTTON = 0,
     STYLE_TEXTBUTTON,