Replace scoped_ptr with unique_ptr in webrtc/call/

webrtc/voice_engine/channel_manager.cc

Index: webrtc/voice_engine/channel_manager.cc
diff --git a/webrtc/voice_engine/channel_manager.cc b/webrtc/voice_engine/channel_manager.cc
index 96f6d2b2eec39d5304f2944c82d07a5120c15a11..eac2e50919df49cad53fb3d5224d2e8446100376 100644
--- a/webrtc/voice_engine/channel_manager.cc
+++ b/webrtc/voice_engine/channel_manager.cc
@@ -49,7 +49,7 @@ ChannelManager::ChannelManager(uint32_t instance_id, const Config& config)
     : instance_id_(instance_id),
       last_channel_id_(-1),
       config_(config),
-      event_log_(rtc::ScopedToUnique(RtcEventLog::Create())) {}
+      event_log_(RtcEventLog::Create()) {}
 
 ChannelOwner ChannelManager::CreateChannel() {
   return CreateChannelInternal(config_);