Add test infrastructure for the file-picker modal test

chrome/browser/ui/libgtk2ui/select_file_dialog_impl_gtk2.cc

Index: chrome/browser/ui/libgtk2ui/select_file_dialog_impl_gtk2.cc
diff --git a/chrome/browser/ui/libgtk2ui/select_file_dialog_impl_gtk2.cc b/chrome/browser/ui/libgtk2ui/select_file_dialog_impl_gtk2.cc
index 3beecc718da28cca68b68300db6d7d34d55690be..f3e6249be2acdbb616fab1f1414a32826c25be95 100644
--- a/chrome/browser/ui/libgtk2ui/select_file_dialog_impl_gtk2.cc
+++ b/chrome/browser/ui/libgtk2ui/select_file_dialog_impl_gtk2.cc
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "chrome/browser/ui/libgtk2ui/select_file_dialog_impl_gtk2.h"
+
 #include <gtk/gtk.h>
 #include <sys/stat.h>
 #include <sys/types.h>
@@ -49,122 +51,6 @@ void OnFileFilterDataDestroyed(std::string* file_extension) {
 
 namespace libgtk2ui {
 
-// Implementation of SelectFileDialog that shows a Gtk common dialog for
-// choosing a file or folder. This acts as a modal dialog.
-class SelectFileDialogImplGTK : public SelectFileDialogImpl,
-                                public aura::WindowObserver {
- public:
-  explicit SelectFileDialogImplGTK(Listener* listener,
-                                   ui::SelectFilePolicy* policy);
-
- protected:
-  ~SelectFileDialogImplGTK() override;
-
-  // BaseShellDialog implementation:
-  bool IsRunning(gfx::NativeWindow parent_window) const override;
-
-  // SelectFileDialog implementation.
-  // |params| is user data we pass back via the Listener interface.
-  void SelectFileImpl(Type type,
-                      const base::string16& title,
-                      const base::FilePath& default_path,
-                      const FileTypeInfo* file_types,
-                      int file_type_index,
-                      const base::FilePath::StringType& default_extension,
-                      gfx::NativeWindow owning_window,
-                      void* params) override;
-
- private:
-  bool HasMultipleFileTypeChoicesImpl() override;
-
-  // Overridden from aura::WindowObserver:
-  void OnWindowDestroying(aura::Window* window) override;
-
-  // Add the filters from |file_types_| to |chooser|.
-  void AddFilters(GtkFileChooser* chooser);
-
-  // Notifies the listener that a single file was chosen.
-  void FileSelected(GtkWidget* dialog, const base::FilePath& path);
-
-  // Notifies the listener that multiple files were chosen.
-  void MultiFilesSelected(GtkWidget* dialog,
-                          const std::vector<base::FilePath>& files);
-
-  // Notifies the listener that no file was chosen (the action was canceled).
-  // Dialog is passed so we can find that |params| pointer that was passed to
-  // us when we were told to show the dialog.
-  void FileNotSelected(GtkWidget* dialog);
-
-  GtkWidget* CreateSelectFolderDialog(
-      Type type,
-      const std::string& title,
-      const base::FilePath& default_path,
-      gfx::NativeWindow parent);
-
-  GtkWidget* CreateFileOpenDialog(const std::string& title,
-      const base::FilePath& default_path, gfx::NativeWindow parent);
-
-  GtkWidget* CreateMultiFileOpenDialog(const std::string& title,
-      const base::FilePath& default_path, gfx::NativeWindow parent);
-
-  GtkWidget* CreateSaveAsDialog(const std::string& title,
-      const base::FilePath& default_path, gfx::NativeWindow parent);
-
-  // Removes and returns the |params| associated with |dialog| from
-  // |params_map_|.
-  void* PopParamsForDialog(GtkWidget* dialog);
-
-  // Take care of internal data structures when a file dialog is destroyed.
-  void FileDialogDestroyed(GtkWidget* dialog);
-
-  // Check whether response_id corresponds to the user cancelling/closing the
-  // dialog. Used as a helper for the below callbacks.
-  bool IsCancelResponse(gint response_id);
-
-  // Common function for OnSelectSingleFileDialogResponse and
-  // OnSelectSingleFolderDialogResponse.
-  void SelectSingleFileHelper(GtkWidget* dialog,
-                              gint response_id,
-                              bool allow_folder);
-
-  // Common function for CreateFileOpenDialog and CreateMultiFileOpenDialog.
-  GtkWidget* CreateFileOpenHelper(const std::string& title,
-                                  const base::FilePath& default_path,
-                                  gfx::NativeWindow parent);
-
-  // Callback for when the user responds to a Save As or Open File dialog.
-  CHROMEGTK_CALLBACK_1(SelectFileDialogImplGTK, void,
-                       OnSelectSingleFileDialogResponse, int);
-
-  // Callback for when the user responds to a Select Folder dialog.
-  CHROMEGTK_CALLBACK_1(SelectFileDialogImplGTK, void,
-                       OnSelectSingleFolderDialogResponse, int);
-
-  // Callback for when the user responds to a Open Multiple Files dialog.
-  CHROMEGTK_CALLBACK_1(SelectFileDialogImplGTK, void,
-                       OnSelectMultiFileDialogResponse, int);
-
-  // Callback for when the file chooser gets destroyed.
-  CHROMEGTK_CALLBACK_0(SelectFileDialogImplGTK, void, OnFileChooserDestroy);
-
-  // Callback for when we update the preview for the selection.
-  CHROMEGTK_CALLBACK_0(SelectFileDialogImplGTK, void, OnUpdatePreview);
-
-  // A map from dialog windows to the |params| user data associated with them.
-  std::map<GtkWidget*, void*> params_map_;
-
-  // The GtkImage widget for showing previews of selected images.
-  GtkWidget* preview_;
-
-  // All our dialogs.
-  std::set<GtkWidget*> dialogs_;
-
-  // The set of all parent windows for which we are currently running dialogs.
-  std::set<aura::Window*> parents_;
-
-  DISALLOW_COPY_AND_ASSIGN(SelectFileDialogImplGTK);
-};
-
 // The size of the preview we display for selected image files. We set height
 // larger than width because generally there is more free space vertically
 // than horiztonally (setting the preview image will alway expand the width of