Make the extra padding around VectorIconButtons configurable.

chrome/browser/ui/views/chrome_views_delegate.cc

Index: chrome/browser/ui/views/chrome_views_delegate.cc
diff --git a/chrome/browser/ui/views/chrome_views_delegate.cc b/chrome/browser/ui/views/chrome_views_delegate.cc
index 88741a15dc8edce8caa5472b33bda44f58baf480..6c2ea361b87b617933cfd0c1ff385bd6be43373f 100644
--- a/chrome/browser/ui/views/chrome_views_delegate.cc
+++ b/chrome/browser/ui/views/chrome_views_delegate.cc
@@ -574,6 +574,11 @@ gfx::Insets ChromeViewsDelegate::GetBubbleDialogMargins() {
   return ViewsDelegate::GetBubbleDialogMargins();
 }
 
+gfx::Insets ChromeViewsDelegate::GetButtonPadding() const {
+  return gfx::Insets(LayoutDelegate::Get()->GetMetric(
+      LayoutDelegate::Metric::BUTTON_PADDING));
+}
+
 #if !defined(USE_ASH)
 views::Widget::InitParams::WindowOpacity
 ChromeViewsDelegate::GetOpacityForInitParams(