Loosening the coupling between WebRTC and //third_party/protobuf

webrtc/modules/audio_coding/BUILD.gn

 # Copyright (c) 2014 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.
 
 import("../../webrtc.gni")
 import("audio_coding.gni")
@@ skipping 819 matching lines @@
     "../../api/audio_codecs:audio_codecs_api",
     "../../base:rtc_base_approved",
     "../../base:rtc_numerics",
     "../../common_audio",
     "../../system_wrappers",
   ]
   public_deps = [
     ":webrtc_opus_c",
   ]
 
+  if (rtc_enable_protobuf) {
+    deps += [ "../../base:protobuf_utils" ]
+  }
+
   defines = audio_codec_defines
   if (rtc_opus_variable_complexity) {
     defines += [ "WEBRTC_OPUS_VARIABLE_COMPLEXITY=1" ]
   } else {
     defines += [ "WEBRTC_OPUS_VARIABLE_COMPLEXITY=0" ]
   }
 
   if (rtc_build_opus) {
     public_deps += [ rtc_opus_dir ]
   } else if (build_with_mozilla) {
@@ skipping 71 matching lines @@
     "../../base:rtc_base_approved",
     "../../common_audio",
     "../../logging:rtc_event_log_api",
     "../../system_wrappers",
   ]
 
   if (rtc_enable_protobuf) {
     deps += [
       ":ana_config_proto",
       ":ana_debug_dump_proto",
+      "../../base:protobuf_utils",
     ]
     defines = [ "WEBRTC_AUDIO_NETWORK_ADAPTOR_DEBUG_DUMP" ]
   }
 
   if (!build_with_chromium && is_clang) {
     # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
     suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
   }
 }
 
@@ skipping 1154 matching lines @@
     defines = audio_coding_defines
 
     if (rtc_enable_protobuf) {
       defines += [
         "WEBRTC_AUDIO_NETWORK_ADAPTOR_DEBUG_DUMP",
         "WEBRTC_NETEQ_UNITTEST_BITEXACT",
       ]
       deps += [
         ":ana_config_proto",
         ":neteq_unittest_proto",
+        "../../base:protobuf_utils",
       ]
     }
 
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
 }
 
@@ skipping 13 matching lines @@
 # webrtc/api/audio_codecs:builtin_audio_decoder_factory instead.
 # TODO(kwiberg): Remove this.
 rtc_source_set("builtin_audio_decoder_factory") {
   sources = [
     "codecs/builtin_audio_decoder_factory.h",
   ]
   deps = [
     "../../api/audio_codecs:builtin_audio_decoder_factory",
   ]
 }