Name SimulcastEncoderApdater on InitEncode.

webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc

Index: webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc b/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
index 3e03cda21aed2eb3e5b72ba5891ab2a7a7a51642..0a17e743f7ce20ddefd1e370579c50decbfc70b8 100644
--- a/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
@@ -136,7 +136,9 @@ class AdapterEncodedImageCallback : public webrtc::EncodedImageCallback {
 namespace webrtc {
 
 SimulcastEncoderAdapter::SimulcastEncoderAdapter(VideoEncoderFactory* factory)
-    : factory_(factory), encoded_complete_callback_(NULL) {
+    : factory_(factory),
+      encoded_complete_callback_(NULL),
+      implementation_name_("SimulcastEncoderAdapter") {
   memset(&codec_, 0, sizeof(webrtc::VideoCodec));
 }
 
@@ -192,6 +194,7 @@ int SimulcastEncoderAdapter::InitEncode(const VideoCodec* inst,
     codec_.codecSpecific.VP8.tl_factory = screensharing_tl_factory_.get();
   }
 
+  std::string implementation_name;
   // Create |number_of_streams| of encoder instances and init them.
   for (int i = 0; i < number_of_streams; ++i) {
     VideoCodec stream_codec;
@@ -221,7 +224,12 @@ int SimulcastEncoderAdapter::InitEncode(const VideoCodec* inst,
     encoder->RegisterEncodeCompleteCallback(callback);
     streaminfos_.push_back(StreamInfo(encoder, callback, stream_codec.width,
                                       stream_codec.height, send_stream));
+    if (i != 0)
+      implementation_name += ", ";
+    implementation_name += streaminfos_[i].encoder->ImplementationName();
   }
+  implementation_name_ =
+      "SimulcastEncoderAdapter (" + implementation_name + ")";
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
@@ -494,10 +502,7 @@ bool SimulcastEncoderAdapter::SupportsNativeHandle() const {
 }
 
 const char* SimulcastEncoderAdapter::ImplementationName() const {
-  // We should not be calling this method before streaminfos_ are configured.
-  RTC_DCHECK(!streaminfos_.empty());
-  // TODO(pbos): Support multiple implementation names for different encoders.
-  return streaminfos_[0].encoder->ImplementationName();
+  return implementation_name_.c_str();
 }
 
 }  // namespace webrtc