Gtk3: Whitelist X11 backend

chrome/browser/ui/libgtkui/gtk_util.h

 // Copyright (c) 2012 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_LIBGTKUI_GTK_UTIL_H_
 #define CHROME_BROWSER_UI_LIBGTKUI_GTK_UTIL_H_
 
 #include <gtk/gtk.h>
 #include <string>
 
@@ skipping 65 matching lines @@
 void ClearAuraTransientParent(GtkWidget* dialog);
 
 #if GTK_MAJOR_VERSION > 2
 // These constants are defined in gtk/gtkenums.h in Gtk3.12 or later.
 // They are added here as a convenience to avoid version checks, and
 // can be removed once the sysroot is switched from Wheezy to Jessie.
 #define GTK_STATE_FLAG_LINK static_cast<GtkStateFlags>(1 << 9)
 #define GTK_STATE_FLAG_VISITED static_cast<GtkStateFlags>(1 << 10)
 #define GTK_STATE_FLAG_CHECKED static_cast<GtkStateFlags>(1 << 11)
 
+void* GetGdkSharedLibrary();
+void* GetGtkSharedLibrary();
+
 class CairoSurface {
  public:
   // Attaches a cairo surface to an SkBitmap so that GTK can render
   // into it.  |bitmap| must outlive this CairoSurface.
   explicit CairoSurface(SkBitmap& bitmap);
 
   // Creates a new cairo surface with the given size.  The memory for
   // this surface is deallocated when this CairoSurface is destroyed.
   explicit CairoSurface(const gfx::Size& size);
 
@@ skipping 128 matching lines @@
 // the background-color property.
 SkColor GetSelectionBgColor(const char* css_selector);
 
 // Get the color of the GtkSeparator specified by |css_selector|.
 SkColor GetSeparatorColor(const char* css_selector);
 #endif
 
 }  // namespace libgtkui
 
 #endif  // CHROME_BROWSER_UI_LIBGTKUI_GTK_UTIL_H_