[gtkmm-documentation] Adapt to FileChooserAction as FileChooser::Action.

[Murray Cumming <murrayc src gnome org>]

commit 9c5e37f72031919cfb786b42952877ec61f98915
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed May 3 09:57:07 2017 +0200

    Adapt to FileChooserAction as FileChooser::Action.

 .../buttons/filechooserbutton/examplewindow.cc     |    2 +-
 .../dialogs/filechooserdialog/examplewindow.cc     |    4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/examples/book/buttons/filechooserbutton/examplewindow.cc 
b/examples/book/buttons/filechooserbutton/examplewindow.cc
index 155ca9f..5a738e6 100644
--- a/examples/book/buttons/filechooserbutton/examplewindow.cc
+++ b/examples/book/buttons/filechooserbutton/examplewindow.cc
@@ -18,7 +18,7 @@
 #include <iostream>
 
 ExampleWindow::ExampleWindow()
-: m_button("Select file", Gtk::FileChooserAction::OPEN)
+: m_button("Select file", Gtk::FileChooser::Action::OPEN)
 {
   set_default_size(200, -1);
 
diff --git a/examples/book/dialogs/filechooserdialog/examplewindow.cc 
b/examples/book/dialogs/filechooserdialog/examplewindow.cc
index e59400b..9b3ab22 100644
--- a/examples/book/dialogs/filechooserdialog/examplewindow.cc
+++ b/examples/book/dialogs/filechooserdialog/examplewindow.cc
@@ -43,7 +43,7 @@ ExampleWindow::~ExampleWindow()
 void ExampleWindow::on_button_folder_clicked()
 {
   Gtk::FileChooserDialog dialog("Please choose a folder",
-          Gtk::FileChooserAction::SELECT_FOLDER);
+          Gtk::FileChooser::Action::SELECT_FOLDER);
   dialog.set_transient_for(*this);
 
   //Add response buttons the the dialog:
@@ -78,7 +78,7 @@ void ExampleWindow::on_button_folder_clicked()
 void ExampleWindow::on_button_file_clicked()
 {
   Gtk::FileChooserDialog dialog("Please choose a file",
-          Gtk::FileChooserAction::OPEN);
+          Gtk::FileChooser::Action::OPEN);
   dialog.set_transient_for(*this);
 
   //Add response buttons the the dialog: