Aura/GTK integration: Create a small stub library that can talk to GTK.

ui/base/linux_ui.cc

Index: ui/base/linux_ui.cc
diff --git a/ui/base/linux_ui.cc b/ui/base/linux_ui.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0f9ed4cf5ccc0e10aaf756f1e0e83df28e67a368
--- /dev/null
+++ b/ui/base/linux_ui.cc
@@ -0,0 +1,24 @@
+// 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.
+
+#include "ui/base/linux_ui.h"
+
+namespace {
+
+ui::LinuxUI* g_linux_ui = NULL;
+
+}  // namespace
+
+namespace ui {
+
+void LinuxUI::SetInstance(LinuxUI* instance) {
+  delete g_linux_ui;
+  g_linux_ui = instance;
+}
+
+const LinuxUI* LinuxUI::instance() {
+  return g_linux_ui;
+}
+
+}  // namespace ui