Relanding of "Adding debug dump to audio network adaptor."

webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor.gypi

 # Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
   'targets': [
     { 'target_name': 'audio_network_adaptor',
       'type': 'static_library',
       'sources': [
         'audio_network_adaptor.cc',
         'audio_network_adaptor_impl.cc',
         'audio_network_adaptor_impl.h',
         'bitrate_controller.h',
         'bitrate_controller.cc',
         'channel_controller.cc',
         'channel_controller.h',
         'controller.h',
         'controller.cc',
         'controller_manager.cc',
         'controller_manager.h',
+        'debug_dump_writer.cc',
+        'debug_dump_writer.h',
         'dtx_controller.h',
         'dtx_controller.cc',
         'fec_controller.h',
         'fec_controller.cc',
         'frame_length_controller.cc',
         'frame_length_controller.h',
         'include/audio_network_adaptor.h',
         'smoothing_filter.h',
         'smoothing_filter.cc',
-      ], # source
+      ], # sources
+      'conditions': [
+        ['enable_protobuf==1', {
+          'dependencies': ['debug_dump_proto'],
+          'defines': ['WEBRTC_AUDIO_NETWORK_ADAPTOR_DEBUG_DUMP'],
+        }],
+      ], # conditions
     },
   ], # targets
+
+  'conditions': [
+    ['enable_protobuf==1', {
+      'targets': [
+        { 'target_name': 'debug_dump_proto',
+          'type': 'static_library',
+          'sources': ['debug_dump.proto',],
+          'variables': {
+            'proto_in_dir': '.',
+            # Workaround to protect against gyp's pathname relativization when
+            # this file is included by modules.gyp.
+            'proto_out_protected': 'webrtc/modules/audio_coding/audio_network_adaptor',
+            'proto_out_dir': '<(proto_out_protected)',
+          },
+          'includes': ['../../../build/protoc.gypi',],
+        },
+      ], # targets
+    }],
+  ], # conditions
 }