Added option to specify a maximum file size when recording an AEC dump.

talk/session/media/channelmanager.h

Index: talk/session/media/channelmanager.h
diff --git a/talk/session/media/channelmanager.h b/talk/session/media/channelmanager.h
index 241766245214b08231798c8406cb41ae9d9c544a..b91ee36c25485cffffb26b5e9c3ca57a77c03315 100644
--- a/talk/session/media/channelmanager.h
+++ b/talk/session/media/channelmanager.h
@@ -167,8 +167,10 @@ class ChannelManager : public rtc::MessageHandler,
 
   // The operations below occur on the main thread.
 
-  // Starts AEC dump using existing file.
-  bool StartAecDump(rtc::PlatformFile file);
+  // Starts AEC dump using existing file, with a specified maximum file size in
+  // bytes. When the limit is reached, logging will stop and the file will be
+  // closed. If max_size_bytes is set to <= 0, no limit will be used.
+  bool StartAecDump(rtc::PlatformFile file, int64_t max_size_bytes);
 
   // Starts RtcEventLog using existing file.
   bool StartRtcEventLog(rtc::PlatformFile file);