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

talk/app/webrtc/peerconnectioninterface.h

Index: talk/app/webrtc/peerconnectioninterface.h
diff --git a/talk/app/webrtc/peerconnectioninterface.h b/talk/app/webrtc/peerconnectioninterface.h
index a5d98ffa747dd73e5f0585194b8e0ac604986acf..231350f72cc7673a45113f79828e41f3fcf6255d 100644
--- a/talk/app/webrtc/peerconnectioninterface.h
+++ b/talk/app/webrtc/peerconnectioninterface.h
@@ -617,9 +617,11 @@ class PeerConnectionFactoryInterface : public rtc::RefCountInterface {
   // Starts AEC dump using existing file. Takes ownership of |file| and passes
   // it on to VoiceEngine (via other objects) immediately, which will take
   // the ownerhip. If the operation fails, the file will be closed.
-  // TODO(grunell): Remove when Chromium has started to use AEC in each source.
-  // http://crbug.com/264611.
-  virtual bool StartAecDump(rtc::PlatformFile file) = 0;
+  // A maximum file size in bytes can be specified. When the file size limit is
+  // reached, logging is stopped automatically. If max_size_bytes is set to a
+  // value <= 0, no limit will be used, and logging will continue until the
+  // StopAecDump function is called.
+  virtual bool StartAecDump(rtc::PlatformFile file, int64_t max_size_bytes) = 0;
 
   // Starts RtcEventLog using existing file. Takes ownership of |file| and
   // passes it on to VoiceEngine, which will take the ownership. If the