Let ViEEncoder handle resolution changes.

webrtc/media/engine/fakewebrtccall.cc

Index: webrtc/media/engine/fakewebrtccall.cc
diff --git a/webrtc/media/engine/fakewebrtccall.cc b/webrtc/media/engine/fakewebrtccall.cc
index 9515505af2c2458f04e25b0ef4aae5f0abe74b5d..88f9927446944fa929458aec9d8382d5c25dbbc6 100644
--- a/webrtc/media/engine/fakewebrtccall.cc
+++ b/webrtc/media/engine/fakewebrtccall.cc
@@ -124,8 +124,9 @@ const webrtc::VideoEncoderConfig& FakeVideoSendStream::GetEncoderConfig()
   return encoder_config_;
 }
 
-std::vector<webrtc::VideoStream> FakeVideoSendStream::GetVideoStreams() {
-  return encoder_config_.streams;
+const std::vector<webrtc::VideoStream>& FakeVideoSendStream::GetVideoStreams()
+    const {
+  return video_streams_;
 }
 
 bool FakeVideoSendStream::IsSending() const {
@@ -171,6 +172,12 @@ int64_t FakeVideoSendStream::GetLastTimestamp() const {
 
 void FakeVideoSendStream::OnFrame(const webrtc::VideoFrame& frame) {
   ++num_swapped_frames_;
+  if (frame.width() != last_frame_.width() ||
+      frame.height() != last_frame_.height() ||
+      frame.rotation() != last_frame_.rotation()) {
+    video_streams_ = encoder_config_.video_stream_factory->CreateEncoderStreams(
+        frame.width(), frame.height(), encoder_config_);
+  }
   last_frame_.ShallowCopy(frame);
 }
 
@@ -192,18 +199,20 @@ void FakeVideoSendStream::EnableEncodedFrameRecording(
 
 void FakeVideoSendStream::ReconfigureVideoEncoder(
     webrtc::VideoEncoderConfig config) {
+  video_streams_ = config.video_stream_factory->CreateEncoderStreams(
+      last_frame_.width(), last_frame_.height(), config);
   if (config.encoder_specific_settings != NULL) {
     if (config_.encoder_settings.payload_name == "VP8") {
       config.encoder_specific_settings->FillVideoCodecVp8(&vpx_settings_.vp8);
-      if (!config.streams.empty()) {
+      if (!video_streams_.empty()) {
         vpx_settings_.vp8.numberOfTemporalLayers = static_cast<unsigned char>(
-            config.streams.back().temporal_layer_thresholds_bps.size() + 1);
+            video_streams_.back().temporal_layer_thresholds_bps.size() + 1);
       }
     } else if (config_.encoder_settings.payload_name == "VP9") {
       config.encoder_specific_settings->FillVideoCodecVp9(&vpx_settings_.vp9);
-      if (!config.streams.empty()) {
+      if (!video_streams_.empty()) {
         vpx_settings_.vp9.numberOfTemporalLayers = static_cast<unsigned char>(
-            config.streams.back().temporal_layer_thresholds_bps.size() + 1);
+            video_streams_.back().temporal_layer_thresholds_bps.size() + 1);
       }
     } else {
       ADD_FAILURE() << "Unsupported encoder payload: "