Prevent static mojo builds from pulling //ui/gl into mojo_shell

gpu/command_buffer/client/gpu_switches.cc

Index: gpu/command_buffer/client/gpu_switches.cc
diff --git a/gpu/command_buffer/client/gpu_switches.cc b/gpu/command_buffer/client/gpu_switches.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f933c19a870fb57f1ba6afd6f3d80a95b9a0d1df
--- /dev/null
+++ b/gpu/command_buffer/client/gpu_switches.cc
@@ -0,0 +1,13 @@
+// Copyright (c) 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.
+
+#include "gpu/command_buffer/client/gpu_switches.h"
+#include "base/basictypes.h"
+
+namespace switches {
+
+// Enable GPU client logging.
+const char kEnableGPUClientLogging[]        = "enable-gpu-client-logging";
+
+}  // namespace switches