OnBeforeDisplay    40 chrome/installer/util/html_dialog.h     virtual void OnBeforeDisplay(void* window) = 0;
OnBeforeDisplay    92 chrome/installer/util/html_dialog.h     virtual void OnBeforeDisplay(void* window);
OnBeforeDisplay    93 chrome/installer/util/html_dialog_impl.cc         callback_->OnBeforeDisplay(target_window);