Don't reconfigure the encoder if the video options aren't changing.

webrtc/media/engine/webrtcvideoengine2.cc

Index: webrtc/media/engine/webrtcvideoengine2.cc
diff --git a/webrtc/media/engine/webrtcvideoengine2.cc b/webrtc/media/engine/webrtcvideoengine2.cc
index cd05f8e6ff5bbe48c820639f10477c8e88dc3306..a57fbc7f5d90ffb616b10ce47560a365c9bb8f92 100644
--- a/webrtc/media/engine/webrtcvideoengine2.cc
+++ b/webrtc/media/engine/webrtcvideoengine2.cc
@@ -1693,10 +1693,13 @@ void WebRtcVideoChannel2::WebRtcVideoSendStream::SetOptions(
     const VideoOptions& options) {
   rtc::CritScope cs(&lock_);
 
+  VideoOptions old_options = parameters_.options;
   parameters_.options.SetAll(options);
   // Reconfigure encoder settings on the next frame or stream
-  // recreation.
-  pending_encoder_reconfiguration_ = true;
+  // recreation if the options changed.
+  if (parameters_.options != old_options) {
+    pending_encoder_reconfiguration_ = true;
+  }
 }
 
 webrtc::VideoCodecType CodecTypeFromName(const std::string& name) {