Linux: add splash screen

chrome/common/x11_util.cc

 // Copyright (c) 2009 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.
 
 // This file defines utility functions for X11 (Linux only). This code has been
 // ported from XCB since we can't use XCB on Ubuntu while its 32-bit support
 // remains woefully incomplete.
 
 #include "chrome/common/x11_util.h"
 #include "chrome/common/x11_util_internal.h"
@@ skipping 64 matching lines @@
 
   if (shared_memory_support_cached)
     return shared_memory_support;
 
   shared_memory_support = DoQuerySharedMemorySupport(dpy);
   shared_memory_support_cached = true;
 
   return shared_memory_support;
 }
 
+XID GetX11RootWindow() {
+  return GDK_WINDOW_XID(gdk_get_default_root_window());
+}
+
 XID GetX11WindowFromGtkWidget(GtkWidget* widget) {
   return GDK_WINDOW_XID(widget->window);
 }
 
 void* GetVisualFromGtkWidget(GtkWidget* widget) {
   return GDK_VISUAL_XVISUAL(gtk_widget_get_visual(widget));
 }
 
 XRenderPictFormat* GetRenderVisualFormat(Display* dpy, Visual* visual) {
   static XRenderPictFormat* pictformat = NULL;
@@ skipping 77 matching lines @@
 
 void FreePicture(Display* display, XID picture) {
   XRenderFreePicture(display, picture);
 }
 
 void FreePixmap(Display* display, XID pixmap) {
   XFreePixmap(display, pixmap);
 }
 
 }  // namespace x11_util