Revert of Move RtcEventLog object from inside VoiceEngine to Call.

webrtc/voice_engine/channel_manager.h

 /*
  *  Copyright (c) 2011 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.
  */
 
 #ifndef WEBRTC_VOICE_ENGINE_CHANNEL_MANAGER_H
 #define WEBRTC_VOICE_ENGINE_CHANNEL_MANAGER_H
 
 #include <memory>
 #include <vector>
 
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/scoped_ref_ptr.h"
+#include "webrtc/call/rtc_event_log.h"
 #include "webrtc/system_wrappers/include/atomic32.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 
 class Config;
 class AudioDecoderFactory;
 
 namespace voe {
 
@@ skipping 81 matching lines @@
   // ChannelOwner.channel() will be NULL if channel_id is invalid or no longer
   // exists. This should be checked with ChannelOwner::IsValid().
   ChannelOwner GetChannel(int32_t channel_id);
   void GetAllChannels(std::vector<ChannelOwner>* channels);
 
   void DestroyChannel(int32_t channel_id);
   void DestroyAllChannels();
 
   size_t NumOfChannels() const;
 
+  // Returns a pointer to the event log object stored within the ChannelManager.
+  RtcEventLog* GetEventLog() const;
+
  private:
   // Create a channel given a configuration, |config|.
   ChannelOwner CreateChannelInternal(
       const Config& config,
       const rtc::scoped_refptr<AudioDecoderFactory>& decoder_factory);
 
   uint32_t instance_id_;
 
   Atomic32 last_channel_id_;
 
   rtc::CriticalSection lock_;
   std::vector<ChannelOwner> channels_;
 
   const Config& config_;
+  std::unique_ptr<RtcEventLog> event_log_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(ChannelManager);
 };
 }  // namespace voe
 }  // namespace webrtc
 
 #endif  // WEBRTC_VOICE_ENGINE_CHANNEL_MANAGER_H