Add FFmpeg audio decoder for the clear key CDM.

webkit/media/webkit_media.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': {
     'conditions': [
       ['OS == "android" or OS == "ios"', {
         # Android and iOS don't use ffmpeg.
         'use_ffmpeg%': 0,
@@ skipping 101 matching lines @@
     {
       'target_name': 'clearkeycdm',
       'type': 'shared_library',
       'conditions': [
         ['use_ffmpeg == 1' , {
           'defines': ['CLEAR_KEY_CDM_USE_FFMPEG_DECODER'],
           'dependencies': [
             '<(DEPTH)/third_party/ffmpeg/ffmpeg.gyp:ffmpeg',
           ],
           'sources': [
+            'crypto/ppapi/ffmpeg_cdm_audio_decoder.cc',
+            'crypto/ppapi/ffmpeg_cdm_audio_decoder.h',
             'crypto/ppapi/ffmpeg_cdm_video_decoder.cc',
             'crypto/ppapi/ffmpeg_cdm_video_decoder.h',
           ],
         }],
       ],
       'defines': ['CDM_IMPLEMENTATION'],
       'dependencies': [
         '<(DEPTH)/base/base.gyp:base',
         '<(DEPTH)/media/media.gyp:media',
       ],
@@ skipping 36 matching lines @@
               # Not to strip important symbols by -Wl,-dead_strip.
               '-Wl,-exported_symbol,_PPP_GetInterface',
               '-Wl,-exported_symbol,_PPP_InitializeModule',
               '-Wl,-exported_symbol,_PPP_ShutdownModule'
             ]},
         }],
       ],
     }
   ],
 }