Refactor ViewsDelegate and MD-ify the icon-to-text spacing for checkbox and radiobutton

chrome/browser/ui/views/harmony/layout_delegate.h

Index: chrome/browser/ui/views/harmony/layout_delegate.h
diff --git a/chrome/browser/ui/views/harmony/layout_delegate.h b/chrome/browser/ui/views/harmony/layout_delegate.h
index 9841b67c9e3f24dfff94c554e74ac90936bda2eb..25333cef86119bdf0b6c91b1f7a29a09a9c78909 100644
--- a/chrome/browser/ui/views/harmony/layout_delegate.h
+++ b/chrome/browser/ui/views/harmony/layout_delegate.h
@@ -24,6 +24,9 @@ class LayoutDelegate {
     // Horizontal or vertical margin between the edge of a dialog and the close
     // button in the upper trailing corner.
     DIALOG_CLOSE_BUTTON_MARGIN,
+    // Horizontal spacing between the image/icon on a label button and its
+    // associated text. This includes checkboxes and radio buttons.
+    ICON_TEXT_SPACING,
     // Horizontal or vertical margin between the edge of a panel and the
     // contained content.
     PANEL_CONTENT_MARGIN,