Adds new libcast_media shared library for cast_shell media

chromecast/chromecast.gyp

 # Copyright 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.
 
 {
   'variables': {
     'android_support_v13_target%':
         '../third_party/android_tools/android_tools.gyp:android_support_v13_javalib',
     'cast_build_release': 'internal/build/cast_build_release',
     'cast_is_debug_build%': 0,
@@ skipping 20 matching lines @@
     ],
   },
   'targets': [
     # Public API target for OEM partners to replace shlibs.
     {
       'target_name': 'cast_public_api',
       'type': '<(component)',
       'sources': [
         'public/cast_egl_platform.h',
         'public/cast_egl_platform_shlib.h',
+        'public/cast_media_shlib.h',
         'public/cast_sys_info.h',
         'public/chromecast_export.h',
         'public/graphics_properties_shlib.h',
         'public/graphics_types.h',
         'public/media/decoder_config.h',
         'public/osd_plane.h',
         'public/osd_plane_shlib.h',
         'public/osd_surface.h',
       ],
     },
@@ skipping 578 matching lines @@
           'sources': [
             'graphics/cast_egl_platform_default.cc',
             'graphics/graphics_properties_default.cc',
             'graphics/osd_plane_default.cc'
           ],
         }
       ]
     }],
   ],  # end of conditions
 }