Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtk2ui/printing_gtk2_util.h

Index: chrome/browser/ui/libgtk2ui/printing_gtk2_util.h
diff --git a/chrome/browser/ui/libgtk2ui/printing_gtk2_util.h b/chrome/browser/ui/libgtk2ui/printing_gtk2_util.h
deleted file mode 100644
index 6df33f854de78dc126a396fc7bbf9b1e04dfcfdd..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/libgtk2ui/printing_gtk2_util.h
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright 2014 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.
-
-#ifndef CHROME_BROWSER_UI_LIBGTK2UI_PRINTING_GTK2_UTIL_H_
-#define CHROME_BROWSER_UI_LIBGTK2UI_PRINTING_GTK2_UTIL_H_
-
-#include "ui/gfx/geometry/size.h"
-
-namespace printing {
-class PrintingContextLinux;
-class PrintSettings;
-}
-
-typedef struct _GtkPrintSettings GtkPrintSettings;
-typedef struct _GtkPageSetup GtkPageSetup;
-
-// Obtains the paper size through Gtk.
-gfx::Size GetPdfPaperSizeDeviceUnitsGtk(
-    printing::PrintingContextLinux* context);
-
-// Initializes a PrintSettings object from the provided Gtk printer objects.
-void InitPrintSettingsGtk(GtkPrintSettings* settings,
-                          GtkPageSetup* page_setup,
-                          printing::PrintSettings* print_settings);
-
-#endif  // CHROME_BROWSER_UI_LIBGTK2UI_PRINTING_GTK2_UTIL_H_