Revert of Move RtcEventLog object from inside VoiceEngine to Call.

webrtc/voice_engine/channel_manager.h

Index: webrtc/voice_engine/channel_manager.h
diff --git a/webrtc/voice_engine/channel_manager.h b/webrtc/voice_engine/channel_manager.h
index c59ee5dc976f276b400e41c008f9f837409c41b3..213a48f769d1bf2290c69fbd0e50139bcb83a22e 100644
--- a/webrtc/voice_engine/channel_manager.h
+++ b/webrtc/voice_engine/channel_manager.h
@@ -17,6 +17,7 @@
 #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"
 
@@ -118,6 +119,9 @@
 
   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(
@@ -132,6 +136,7 @@
   std::vector<ChannelOwner> channels_;
 
   const Config& config_;
+  std::unique_ptr<RtcEventLog> event_log_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(ChannelManager);
 };