Add missing views class names

ui/views/controls/message_box_view.cc

Index: ui/views/controls/message_box_view.cc
diff --git a/ui/views/controls/message_box_view.cc b/ui/views/controls/message_box_view.cc
index 2c0f102cf117d78b046b4d0ce2229ba5206349b1..1993f6d1d56b131b919a32851403f0446a944600 100644
--- a/ui/views/controls/message_box_view.cc
+++ b/ui/views/controls/message_box_view.cc
@@ -66,6 +66,9 @@ namespace views {
 ///////////////////////////////////////////////////////////////////////////////
 // MessageBoxView, public:
 
+// static
+const char MessageBoxView::kViewClassName[] = "MessageBoxView";
+
 MessageBoxView::InitParams::InitParams(const base::string16& message)
     : options(NO_OPTIONS),
       message(message),
@@ -158,6 +161,10 @@ bool MessageBoxView::AcceleratorPressed(const ui::Accelerator& accelerator) {
   return true;
 }
 
+const char* MessageBoxView::GetClassName() const {
+  return kViewClassName;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // MessageBoxView, private: