[Cast] Consolidate plethora of GYP files into cast.gyp and cast_testing.gypi.

media/cast/audio_receiver/audio_receiver.gypi

Index: media/cast/audio_receiver/audio_receiver.gypi
diff --git a/media/cast/audio_receiver/audio_receiver.gypi b/media/cast/audio_receiver/audio_receiver.gypi
deleted file mode 100644
index 048227cd6419e511eb4055d51941ffecf634750a..0000000000000000000000000000000000000000
--- a/media/cast/audio_receiver/audio_receiver.gypi
+++ /dev/null
@@ -1,31 +0,0 @@
-# Copyright 2013 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.
-
-{
-  'targets': [
-    {
-      'target_name': 'cast_audio_receiver',
-      'type': 'static_library',
-      'include_dirs': [
-        '<(DEPTH)/',
-        '<(DEPTH)/third_party/',
-        '<(DEPTH)/third_party/webrtc/',
-      ],
-      'sources': [
-        'audio_decoder.h',
-        'audio_decoder.cc',
-        'audio_receiver.h',
-        'audio_receiver.cc',
-      ], # source
-      'dependencies': [
-        '<(DEPTH)/media/media.gyp:media',
-        '<(DEPTH)/media/media.gyp:shared_memory_support',
-        '<(DEPTH)/media/cast/transport/utility/utility.gyp:transport_utility',
-        '<(DEPTH)/media/cast/rtcp/rtcp.gyp:cast_rtcp',
-        '<(DEPTH)/media/cast/rtp_receiver/rtp_receiver.gyp:cast_rtp_receiver',
-        '<(DEPTH)/third_party/opus/opus.gyp:opus',
-      ],
-    },
-  ],
-}