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

ui/views/bubble/bubble_dialog_delegate.cc

Index: ui/views/bubble/bubble_dialog_delegate.cc
diff --git a/ui/views/bubble/bubble_dialog_delegate.cc b/ui/views/bubble/bubble_dialog_delegate.cc
index 735a2237bcb536fb0bb272a2fa06b6abff199ae6..b22ed83910101802142310c9f81e34f211063d0d 100644
--- a/ui/views/bubble/bubble_dialog_delegate.cc
+++ b/ui/views/bubble/bubble_dialog_delegate.cc
@@ -216,10 +216,13 @@ BubbleDialogDelegateView::BubbleDialogDelegateView(View* anchor_view,
       adjust_if_offscreen_(true),
       parent_window_(NULL) {
   ViewsDelegate* views_delegate = ViewsDelegate::GetInstance();
-  margins_ = views_delegate ? views_delegate->GetBubbleDialogMargins()
-                            : gfx::Insets(kPanelVertMargin, kPanelHorizMargin);
+  margins_ = views_delegate
+                 ? views_delegate->GetInsetsMetric(
+                       ViewsDelegate::InsetsMetric::BUBBLE_DIALOG)
+                 : gfx::Insets(kPanelVertMargin, kPanelHorizMargin);
   title_margins_ = views_delegate
-                       ? views_delegate->GetDialogFrameViewInsets()
+                       ? views_delegate->GetInsetsMetric(
+                             ViewsDelegate::InsetsMetric::DIALOG_FRAME_VIEW)
                        : gfx::Insets(kPanelVertMargin, kPanelHorizMargin, 0,
                                      kPanelHorizMargin);
   if (anchor_view)