Add a parameter to set a maximum filesize when starting an RTC event log on the PeerConnectionFacto…

webrtc/media/base/mediaengine.h

Index: webrtc/media/base/mediaengine.h
diff --git a/webrtc/media/base/mediaengine.h b/webrtc/media/base/mediaengine.h
index 4c7d62a1e4b7bc99503c3ce8885d4c80a276295a..4446bd6b0e4446c6d501e7e5c87d03794199e564 100644
--- a/webrtc/media/base/mediaengine.h
+++ b/webrtc/media/base/mediaengine.h
@@ -93,8 +93,11 @@ class MediaEngineInterface {
   // Stops recording AEC dump.
   virtual void StopAecDump() = 0;
 
-  // Starts RtcEventLog using existing file.
-  virtual bool StartRtcEventLog(rtc::PlatformFile file) = 0;
+  // Starts RtcEventLog using existing file. A maximum file size in bytes can be
+  // specified. Logging is stopped just before the size limit is exceeded.
+  // If max_size_bytes is set to a value <= 0, no limit will be used.
+  virtual bool StartRtcEventLog(rtc::PlatformFile file,
+                                int64_t max_size_bytes) = 0;
 
   // Stops recording an RtcEventLog.
   virtual void StopRtcEventLog() = 0;
@@ -176,8 +179,9 @@ class CompositeMediaEngine : public MediaEngineInterface {
     voice_.StopAecDump();
   }
 
-  virtual bool StartRtcEventLog(rtc::PlatformFile file) {
-    return voice_.StartRtcEventLog(file);
+  virtual bool StartRtcEventLog(rtc::PlatformFile file,
+                                int64_t max_size_bytes) {
+    return voice_.StartRtcEventLog(file, max_size_bytes);
   }
 
   virtual void StopRtcEventLog() { voice_.StopRtcEventLog(); }