Replace scoped_ptr with unique_ptr in webrtc/modules/audio_coding/

webrtc/modules/audio_coding/acm2/audio_coding_module_impl.h

Index: webrtc/modules/audio_coding/acm2/audio_coding_module_impl.h
diff --git a/webrtc/modules/audio_coding/acm2/audio_coding_module_impl.h b/webrtc/modules/audio_coding/acm2/audio_coding_module_impl.h
index 102396f70b372375ab7227783eef0f6df4622619..cdf49443c0d9a9b94e7457b11aea2273f57320ee 100644
--- a/webrtc/modules/audio_coding/acm2/audio_coding_module_impl.h
+++ b/webrtc/modules/audio_coding/acm2/audio_coding_module_impl.h
@@ -11,12 +11,12 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_ACM2_AUDIO_CODING_MODULE_IMPL_H_
 #define WEBRTC_MODULES_AUDIO_CODING_ACM2_AUDIO_CODING_MODULE_IMPL_H_
 
+#include <memory>
 #include <string>
 #include <vector>
 
 #include "webrtc/base/buffer.h"
 #include "webrtc/base/criticalsection.h"
-#include "webrtc/base/scoped_ptr.h"
 #include "webrtc/base/thread_annotations.h"
 #include "webrtc/common_types.h"
 #include "webrtc/engine_configurations.h"
@@ -253,7 +253,7 @@ class AudioCodingModuleImpl final : public AudioCodingModule {
     CodecManager codec_manager;
     RentACodec rent_a_codec;
   };
-  rtc::scoped_ptr<EncoderFactory> encoder_factory_ GUARDED_BY(acm_crit_sect_);
+  std::unique_ptr<EncoderFactory> encoder_factory_ GUARDED_BY(acm_crit_sect_);
 
   // Current encoder stack, either obtained from
   // encoder_factory_->rent_a_codec.RentEncoderStack or provided by a call to
@@ -269,7 +269,7 @@ class AudioCodingModuleImpl final : public AudioCodingModule {
   // IMPORTANT: this variable is only used in IncomingPayload(), therefore,
   // no lock acquired when interacting with this variable. If it is going to
   // be used in other methods, locks need to be taken.
-  rtc::scoped_ptr<WebRtcRTPHeader> aux_rtp_header_;
+  std::unique_ptr<WebRtcRTPHeader> aux_rtp_header_;
 
   bool receiver_initialized_ GUARDED_BY(acm_crit_sect_);