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

talk/app/webrtc/peerconnectionfactory.h

Index: talk/app/webrtc/peerconnectionfactory.h
diff --git a/talk/app/webrtc/peerconnectionfactory.h b/talk/app/webrtc/peerconnectionfactory.h
index f8e0a40de2111d83d9cf530ba0d59f1e89109333..d7c683dfb5827c1650f6274fc456aedc63811cc7 100644
--- a/talk/app/webrtc/peerconnectionfactory.h
+++ b/talk/app/webrtc/peerconnectionfactory.h
@@ -79,7 +79,7 @@ class PeerConnectionFactory : public PeerConnectionFactoryInterface {
       CreateAudioTrack(const std::string& id,
                        AudioSourceInterface* audio_source) override;
 
-  bool StartAecDump(rtc::PlatformFile file) override;
+  bool StartAecDump(rtc::PlatformFile file, int64_t max_size_bytes) override;
   bool StartRtcEventLog(rtc::PlatformFile file) override;
   void StopRtcEventLog() override;