Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtkui/select_file_dialog_interactive_uitest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // 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 "base/macros.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/chrome_select_file_policy.h"
+#include "chrome/browser/ui/libgtkui/select_file_dialog_impl_gtk2.h"
 #include "chrome/browser/ui/view_ids.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/interactive_test_utils.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "ui/shell_dialogs/select_file_dialog.h"
 #include "ui/views/test/widget_test.h"
 #include "ui/views/widget/widget.h"
 
 using BrowserSelectFileDialogTest = InProcessBrowserTest;
 
-namespace libgtk2ui {
+namespace libgtkui {
 
 // FilePicker opens a GtkFileChooser.
 class FilePicker : public ui::SelectFileDialog::Listener {
  public:
   explicit FilePicker(BrowserWindow* window) {
     select_file_dialog_ = ui::SelectFileDialog::Create(
         this, new ChromeSelectFilePolicy(nullptr));
 
     gfx::NativeWindow parent_window = window->GetNativeWindow();
     ui::SelectFileDialog::FileTypeInfo file_types;
@@ skipping 26 matching lines @@
   void FileSelected(const base::FilePath& path,
                     int index,
                     void* params) override {}
  private:
   // Dialog box used for opening and saving files.
   scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
 
   DISALLOW_COPY_AND_ASSIGN(FilePicker);
 };
 
-}  // namespace libgtk2ui
+}  // namespace libgtkui
 
 // Test that the file-picker is modal.
 IN_PROC_BROWSER_TEST_F(BrowserSelectFileDialogTest, ModalTest) {
   // Bring the native window to the foreground. Returns true on success.
   ASSERT_TRUE(ui_test_utils::BringBrowserWindowToFront(browser()));
   ASSERT_TRUE(browser()->window()->IsActive());
 
   // Leaks in GtkFileChooserDialog. http://crbug.com/537468
   ANNOTATE_SCOPED_MEMORY_LEAK;
-  libgtk2ui::FilePicker file_picker(browser()->window());
+  libgtkui::FilePicker file_picker(browser()->window());
 
   gfx::NativeWindow window = browser()->window()->GetNativeWindow();
   views::Widget* widget = views::Widget::GetWidgetForNativeWindow(window);
   ASSERT_NE(nullptr, widget);
 
   // Run a nested loop until the browser window becomes inactive
   // so that the file-picker can be active.
   views::test::WidgetActivationWaiter waiter_inactive(widget, false);
   waiter_inactive.Wait();
   EXPECT_FALSE(browser()->window()->IsActive());
@@ skipping 14 matching lines @@
 
   file_picker.Close();
 
   // Run a nested loop until the browser window becomes active.
   views::test::WidgetActivationWaiter wait_active(widget, true);
   wait_active.Wait();
 
   ui_test_utils::ClickOnView(browser(), VIEW_ID_TAB_CONTAINER);
   EXPECT_TRUE(browser()->window()->IsActive());
 }