Move Mutexy things to private.

gyp/tools.gyp

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
     # GYP file to build various tools.
 #
 # To build on Linux:
 #  ./gyp_skia tools.gyp && make tools
 #
 {
@@ skipping 100 matching lines @@
       },
     },
     {
       'target_name': 'sk_tool_utils',
       'type': 'static_library',
       'sources': [
         '../tools/sk_tool_utils.cpp',
         '../tools/sk_tool_utils_font.cpp',
       ],
       'include_dirs': [
+        '../include/private',
         '../src/fonts',
         '../src/core',
       ],
       'dependencies': [
         'resources',
         'flags.gyp:flags',
         'skia_lib.gyp:skia_lib',
       ],
       'direct_dependent_settings': {
         'include_dirs': [ '../tools', ],
@@ skipping 719 matching lines @@
               'flags.gyp:flags',
               'skia_lib.gyp:skia_lib',
               'resources',
             ],
           },
         ],
       },
     ],
   ],
 }