views: Add comment to Combobox's native wrapper about its lifetime.

views/controls/combobox/combobox.cc

Index: views/controls/combobox/combobox.cc
diff --git a/views/controls/combobox/combobox.cc b/views/controls/combobox/combobox.cc
index 0f8ee2bdee16e2e35578500faaaaa54071d3b460..794301aa32cf5dfbccfbdd5388f3c91652c2a192 100644
--- a/views/controls/combobox/combobox.cc
+++ b/views/controls/combobox/combobox.cc
@@ -129,6 +129,8 @@ void Combobox::GetAccessibleState(ui::AccessibleViewState* state) {
 void Combobox::ViewHierarchyChanged(bool is_add, View* parent,
                                     View* child) {
   if (is_add && !native_wrapper_ && GetWidget()) {
+    // The native wrapper's lifetime will be managed by the view hierarchy after
+    // we call AddChildView.
     native_wrapper_ = NativeComboboxWrapper::CreateWrapper(this);

[tfarina, 2011/09/20 18:10:50]

Same as in views/controls/textfield/textfield.cc:416

     AddChildView(native_wrapper_->GetView());
   }