aura: Make 'ui' buildable without gtk.

ui/gfx/pango_util.cc

 // Copyright (c) 2011 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 "ui/gfx/pango_util.h"
 
 #include <cairo/cairo.h>
-#include <gtk/gtk.h>
 #include <pango/pango.h>
 #include <pango/pangocairo.h>
 
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/font.h"
 
-#if !defined(USE_WAYLAND)
+#if !defined(USE_WAYLAND) && defined(TOOLKIT_USES_GTK)
+#include <gtk/gtk.h>
 #include "ui/gfx/gtk_util.h"
 #else
 #include "ui/gfx/linux_util.h"
 #endif
 
 #include "ui/gfx/skia_util.h"
 
 namespace {
 
 // Marker for accelerators in the text.
 const gunichar kAcceleratorChar = '&';
 
 // Return |cairo_font_options|. If needed, allocate and update it based on
 // GtkSettings.
 cairo_font_options_t* GetCairoFontOptions() {
   // Font settings that we initialize once and then use when drawing text.
   static cairo_font_options_t* cairo_font_options = NULL;
 
   if (cairo_font_options)
     return cairo_font_options;
 
   cairo_font_options = cairo_font_options_create();
 
   gint antialias = 0;
   gint hinting = 0;
   gchar* hint_style = NULL;
   gchar* rgba_style = NULL;
 
-#if !defined(USE_WAYLAND) && !defined(USE_AURA)
+#if !defined(USE_WAYLAND) && defined(TOOLKIT_USES_GTK)
   // TODO(xji): still has gtk dependency.
   GtkSettings* gtk_settings = gtk_settings_get_default();
   g_object_get(gtk_settings,
                "gtk-xft-antialias", &antialias,
                "gtk-xft-hinting", &hinting,
                "gtk-xft-hintstyle", &hint_style,
                "gtk-xft-rgba", &rgba_style,
                NULL);
 #endif
 
@@ skipping 125 matching lines @@
         RemoveAcceleratorChar(utf8, static_cast<char>(kAcceleratorChar));
 
     pango_layout_set_text(layout,
         accelerator_removed.data(), accelerator_removed.size());
   } else {
     pango_layout_set_text(layout, utf8.data(), utf8.size());
   }
 }
 
 }  // namespace gfx