Fix the absence of padding on some UI buttons.

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

Index: chrome/browser/ui/views/harmony/layout_delegate.cc
diff --git a/chrome/browser/ui/views/harmony/layout_delegate.cc b/chrome/browser/ui/views/harmony/layout_delegate.cc
index d366297d1520fffbeb0db5a3fd029cdd8165bb85..1f80b8776d9492dc62e1618e34ede4c13608d15f 100644
--- a/chrome/browser/ui/views/harmony/layout_delegate.cc
+++ b/chrome/browser/ui/views/harmony/layout_delegate.cc
@@ -23,7 +23,9 @@ LayoutDelegate* LayoutDelegate::Get() {
 int LayoutDelegate::GetMetric(Metric metric) const {
   switch (metric) {
     case Metric::BUTTON_HORIZONTAL_PADDING:
-      return 0;
+      return views::kButtonHorizontalPadding;
+    case Metric::BUTTON_MINIMUM_WIDTH:
+      return views::kMinimumButtonWidth;
     case Metric::DIALOG_BUTTON_MARGIN:
       return views::kButtonHEdgeMarginNew;
     case Metric::DIALOG_BUTTON_MINIMUM_WIDTH: