Loosening the coupling between WebRTC and //third_party/protobuf

webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.h

Index: webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.h
diff --git a/webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.h b/webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.h
index 338a3657e28ec75ba5748f7047e3f2b0332ab834..41978e3e41fff367ee71dc395ce602f0ef3f1b0b 100644
--- a/webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.h
+++ b/webrtc/modules/audio_coding/audio_network_adaptor/controller_manager.h
@@ -18,6 +18,10 @@
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/modules/audio_coding/audio_network_adaptor/controller.h"
 
+#ifdef WEBRTC_AUDIO_NETWORK_ADAPTOR_DEBUG_DUMP
+#include "webrtc/base/protobuf_utils.h"
+#endif
+
 namespace webrtc {
 
 class Clock;
@@ -49,7 +53,11 @@ class ControllerManagerImpl final : public ControllerManager {
   };
 
   static std::unique_ptr<ControllerManager> Create(
+#ifdef WEBRTC_AUDIO_NETWORK_ADAPTOR_DEBUG_DUMP
+      const ProtoString& config_string,
+#else
       const std::string& config_string,
+#endif
       size_t num_encoder_channels,
       rtc::ArrayView<const int> encoder_frame_lengths_ms,
       int min_encoder_bitrate_bps,