Cast channel logging: log additional statistics.

extensions/browser/api/cast_channel/logger.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_
 #define EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 99 matching lines @@
   typedef std::map<int, linked_ptr<AggregatedSocketEventLog> >
       AggregatedSocketEventLogMap;
 
   // Returns a SocketEvent proto with common fields (EventType, timestamp)
   // populated.
   proto::SocketEvent CreateEvent(proto::EventType event_type);
 
   // Records |event| associated with |channel_id|.
   // If the internal map is already logging maximum number of sockets and this
   // is a new socket, the socket with the smallest channel id will be discarded.
-  // Returns a pointer to the Event proto with |event_type| and
-  // timestamp populated.
-  void LogSocketEvent(int channel_id, const proto::SocketEvent& socket_event);
+  // Returns a reference to the AggregatedSocketEvent proto created/modified.
+  proto::AggregatedSocketEvent& LogSocketEvent(
+      int channel_id,
+      const proto::SocketEvent& socket_event);
 
   scoped_ptr<base::TickClock> clock_;
   AggregatedSocketEventLogMap aggregated_socket_events_;
   base::TimeTicks unix_epoch_time_ticks_;
 
-  // Number of socket / event entries evicted by the logger due to size
-  // constraints.
-  int num_evicted_aggregated_socket_events_;
-  int num_evicted_socket_events_;
+  // Log proto holding global statistics.
+  proto::Log log_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(Logger);
 };
 }  // namespace cast_channel
 }  // namespace api
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_CAST_CHANNEL_LOGGER_H_