Add BrowserSelectFileDialogTest.OpenCloseFileDialog

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 6a0cb7cb8957ab5ace97619c5bbc2c51ddd44b7f..05a0932b367a1021bc52e3f4b49d26c63875a7ff 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 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <gdk/gdkx.h>
 #include <gtk/gtk.h>
 #include <sys/stat.h>
 #include <sys/types.h>
@@ -29,6 +30,7 @@
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/shell_dialogs/select_file_dialog.h"
 #include "ui/strings/grit/ui_strings.h"
+#include "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
 #include "ui/views/widget/desktop_aura/x11_desktop_handler.h"
 
 namespace {
@@ -57,6 +59,9 @@ class SelectFileDialogImplGTK : public SelectFileDialogImpl,
   explicit SelectFileDialogImplGTK(Listener* listener,
                                    ui::SelectFilePolicy* policy);
 
+  // Close the file dialog.
+  void Close() override;
+
  protected:
   ~SelectFileDialogImplGTK() override;
 
@@ -289,6 +294,39 @@ void SelectFileDialogImplGTK::SelectFileImpl(
   gtk_window_present_with_time(GTK_WINDOW(dialog), time);
 }
 
+void SelectFileDialogImplGTK::Close() {
+  // Close the file-picker by sending an ESC key event to it.
+
+  // Get the focused dialog.
+  XID focused_window = 0;
+  int revert = 0;
+  XGetInputFocus(gfx::GetXDisplay(), &focused_window, &revert);
+
+  // Check if the focused window is the file-picker dialog.
+  bool is_dialog_focused = false;
+  for (auto it = dialogs_.begin(); it != dialogs_.end(); ++it) {
+    if (focused_window == GDK_WINDOW_XID(gtk_widget_get_window(*it))) {
+      is_dialog_focused = true;
+      break;
+    }
+  }
+
+  if (!is_dialog_focused) {
+    NOTREACHED() << "Cannot find the focused dialog";
+    return;
+  }
+
+  // Send an ESC key event to the focused dialog.
+  XKeyEvent event = {0};
+  event.display = gfx::GetXDisplay();
+  event.window = focused_window;
+  event.keycode = XKeysymToKeycode(gfx::GetXDisplay(), XK_Escape);
+  event.type = KeyPress;
+
+  XSendEvent(gfx::GetXDisplay(), focused_window, True, KeyPressMask,
+             reinterpret_cast<XEvent*>(&event));
+}
+
 void SelectFileDialogImplGTK::AddFilters(GtkFileChooser* chooser) {
   for (size_t i = 0; i < file_types_.extensions.size(); ++i) {
     GtkFileFilter* filter = NULL;