Move Pipeline permanent callbacks into Pipeline::Client interface.

media/media.gyp

 # 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,
     # Override to dynamically link the cras (ChromeOS audio) library.
     'use_cras%': 0,
     # Option e.g. for Linux distributions to link pulseaudio directly
@@ skipping 371 matching lines @@
         'base/mime_util_internal.h',
         'base/moving_average.cc',
         'base/moving_average.h',
         'base/multi_channel_resampler.cc',
         'base/multi_channel_resampler.h',
         'base/null_video_sink.cc',
         'base/null_video_sink.h',
         'base/output_device_info.cc',
         'base/output_device_info.h',
         'base/pipeline.h',
+        'base/pipeline_client.h',
         'base/pipeline_impl.cc',
         'base/pipeline_impl.h',
         'base/pipeline_status.h',
         'base/player_tracker.cc',
         'base/player_tracker.h',
         'base/ranges.cc',
         'base/ranges.h',
         'base/renderer.cc',
         'base/renderer.h',
         'base/renderer_factory.cc',
@@ skipping 1667 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }