Added StopAecDump function to PeerConnectionFactory.

talk/media/base/mediaengine.h

Index: talk/media/base/mediaengine.h
diff --git a/talk/media/base/mediaengine.h b/talk/media/base/mediaengine.h
index c5b90962f9730e90965d91a0b585b77b7e256bfd..1a992d7d4a7700470a71ca53f6b5601241a569e1 100644
--- a/talk/media/base/mediaengine.h
+++ b/talk/media/base/mediaengine.h
@@ -122,6 +122,9 @@ class MediaEngineInterface {
   // Starts AEC dump using existing file.
   virtual bool StartAecDump(rtc::PlatformFile file) = 0;
 
+  // Stops recording AEC dump.
+  virtual void StopAecDump() = 0;
+
   // Starts RtcEventLog using existing file.
   virtual bool StartRtcEventLog(rtc::PlatformFile file) = 0;
 
@@ -225,6 +228,10 @@ class CompositeMediaEngine : public MediaEngineInterface {
     return voice_.StartAecDump(file);
   }
 
+  virtual void StopAecDump() {
+    voice_.StopAecDump();
+  }
+
   virtual bool StartRtcEventLog(rtc::PlatformFile file) {
     return voice_.StartRtcEventLog(file);
   }