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

gpu/gpu_common.gypi

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # These are defined here because we need to build this library twice. Once
     # with extra parameter checking. Once with no parameter checking to be 100%
     # OpenGL ES 2.0 compliant for the conformance tests.
@@ skipping 20 matching lines @@
       'command_buffer/client/gles2_implementation.h',
       'command_buffer/client/gles2_implementation_impl_autogen.h',
       'command_buffer/client/gles2_interface.h',
       'command_buffer/client/gles2_trace_implementation_autogen.h',
       'command_buffer/client/gles2_trace_implementation.cc',
       'command_buffer/client/gles2_trace_implementation.h',
       'command_buffer/client/gles2_trace_implementation_impl_autogen.h',
       'command_buffer/client/gpu_memory_buffer_factory.h',
       'command_buffer/client/gpu_memory_buffer_tracker.cc',
       'command_buffer/client/gpu_memory_buffer_tracker.h',
+      'command_buffer/client/gpu_switches.cc',
+      'command_buffer/client/gpu_switches.h',
       'command_buffer/client/program_info_manager.cc',
       'command_buffer/client/program_info_manager.h',
       'command_buffer/client/query_tracker.cc',
       'command_buffer/client/query_tracker.h',
       'command_buffer/client/share_group.cc',
       'command_buffer/client/share_group.h',
       'command_buffer/client/vertex_array_object_manager.cc',
       'command_buffer/client/vertex_array_object_manager.h',
     ]
   },
 }