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

chrome/browser/first_run/try_chrome_dialog_view.cc

Index: chrome/browser/first_run/try_chrome_dialog_view.cc
diff --git a/chrome/browser/first_run/try_chrome_dialog_view.cc b/chrome/browser/first_run/try_chrome_dialog_view.cc
index 16482e6ef87d213639d54d2494b0e02893e7f68b..fed98686525307277e1c52bb4322c70b550c232e 100644
--- a/chrome/browser/first_run/try_chrome_dialog_view.cc
+++ b/chrome/browser/first_run/try_chrome_dialog_view.cc
@@ -34,6 +34,7 @@
 #include "ui/views/controls/separator.h"
 #include "ui/views/layout/grid_layout.h"
 #include "ui/views/layout/layout_constants.h"
+#include "ui/views/views_delegate.h"
 #include "ui/views/widget/widget.h"
 
 namespace {
@@ -134,7 +135,9 @@ TryChromeDialogView::Result TryChromeDialogView::ShowModal(
   columns->AddPaddingColumn(0, icon_size.width());
   columns->AddColumn(views::GridLayout::LEADING, views::GridLayout::FILL, 0,
                      views::GridLayout::USE_PREF, 0, 0);
-  columns->AddPaddingColumn(0, views::kRelatedButtonHSpacing);
+  columns->AddPaddingColumn(
+      0, views::ViewsDelegate::GetInstance()->GetSpacingMetric(
+             views::SpacingMetric::RELATED_HORIZONTAL_BUTTON));
   columns->AddColumn(views::GridLayout::LEADING, views::GridLayout::FILL, 0,
                      views::GridLayout::USE_PREF, 0, 0);