[MD] Fix clipping of infobar child elements (particularly close button).

chrome/browser/ui/views/infobars/alternate_nav_infobar_view.cc

Index: chrome/browser/ui/views/infobars/alternate_nav_infobar_view.cc
diff --git a/chrome/browser/ui/views/infobars/alternate_nav_infobar_view.cc b/chrome/browser/ui/views/infobars/alternate_nav_infobar_view.cc
index 4f89f800d169e41060ac4c5dc898ca6d99114d55..ad9a0aecf4e60611fb83647f93f11bfa7ee6d4f6 100644
--- a/chrome/browser/ui/views/infobars/alternate_nav_infobar_view.cc
+++ b/chrome/browser/ui/views/infobars/alternate_nav_infobar_view.cc
@@ -81,15 +81,15 @@ void AlternateNavInfoBarView::ViewHierarchyChanged(
     DCHECK_NE(base::string16::npos, offset);
     label_1_text_ = message_text.substr(0, offset);
     label_1_ = CreateLabel(label_1_text_);
-    AddChildView(label_1_);
+    AddViewToContentArea(label_1_);
 
     link_text_ = delegate->GetLinkText();
     link_ = CreateLink(link_text_, this);
-    AddChildView(link_);
+    AddViewToContentArea(link_);
 
     label_2_text_ = message_text.substr(offset);
     label_2_ = CreateLabel(label_2_text_);
-    AddChildView(label_2_);
+    AddViewToContentArea(label_2_);
   }
 
   // This must happen after adding all other children so InfoBarView can ensure