Make ARC's intent picker use the buttons insets.

ui/views/window/dialog_client_view.cc

Index: ui/views/window/dialog_client_view.cc
diff --git a/ui/views/window/dialog_client_view.cc b/ui/views/window/dialog_client_view.cc
index 775f54d9815b039505f80e17a8266c9091a481d9..094d098e299b5c7a4d9569c5fbad0d282d2ef40b 100644
--- a/ui/views/window/dialog_client_view.cc
+++ b/ui/views/window/dialog_client_view.cc
@@ -108,6 +108,12 @@ void DialogClientView::UpdateDialogButtons() {
   InvalidateLayout();
 }
 
+void DialogClientView::SetButtonRowInsets(const gfx::Insets& insets) {
+  button_row_insets_ = insets;
+  if (GetWidget())
+    UpdateDialogButtons();
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // DialogClientView, ClientView overrides: