Add views::RichLabel, a class which creates multi-line text with mixed

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 5a3e503942f2eb488d1da72cc9f27832ce7d0c64..e3b97c68fd1b7931863a51509664b3dd53d2513d 100644
--- a/ui/views/window/dialog_client_view.cc
+++ b/ui/views/window/dialog_client_view.cc
@@ -182,7 +182,7 @@ void DialogClientView::Layout() {
 
   // Layout the footnote view.
   if (footnote_view_) {
-    const int height = footnote_view_->GetPreferredSize().height();
+    const int height = footnote_view_->GetHeightForWidth(bounds.width());
     footnote_view_->SetBounds(bounds.x(), bounds.bottom() - height,
                               bounds.width(), height);
     bounds.Inset(0, 0, 0, height + kRelatedControlVerticalSpacing);