Let ViEEncoder handle resolution changes.

webrtc/media/engine/fakewebrtccall.h

Index: webrtc/media/engine/fakewebrtccall.h
diff --git a/webrtc/media/engine/fakewebrtccall.h b/webrtc/media/engine/fakewebrtccall.h
index 29142c18b777f3c6d3816cd8e22dc6bde8cf50e4..f53dcc4401726c1d90c51622a7fa17a10bdca58c 100644
--- a/webrtc/media/engine/fakewebrtccall.h
+++ b/webrtc/media/engine/fakewebrtccall.h
@@ -21,6 +21,7 @@
 #define WEBRTC_MEDIA_ENGINE_FAKEWEBRTCCALL_H_
 
 #include <memory>
+#include <string>
 #include <vector>
 
 #include "webrtc/api/call/audio_receive_stream.h"
@@ -108,7 +109,7 @@ class FakeVideoSendStream final
   ~FakeVideoSendStream() override;
   const webrtc::VideoSendStream::Config& GetConfig() const;
   const webrtc::VideoEncoderConfig& GetEncoderConfig() const;
-  std::vector<webrtc::VideoStream> GetVideoStreams();
+  const std::vector<webrtc::VideoStream>& GetVideoStreams() const;
 
   bool IsSending() const;
   bool GetVp8Settings(webrtc::VideoCodecVP8* settings) const;
@@ -138,6 +139,7 @@ class FakeVideoSendStream final
   bool sending_;
   webrtc::VideoSendStream::Config config_;
   webrtc::VideoEncoderConfig encoder_config_;
+  std::vector<webrtc::VideoStream> video_streams_;
   bool codec_settings_set_;
   union VpxSettings {
     webrtc::VideoCodecVP8 vp8;
@@ -257,4 +259,4 @@ class FakeCall final : public webrtc::Call, public webrtc::PacketReceiver {
 };
 
 }  // namespace cricket
-#endif  // TALK_MEDIA_WEBRTC_WEBRTCVIDEOENGINE2_UNITTEST_H_
+#endif  // WEBRTC_MEDIA_ENGINE_FAKEWEBRTCCALL_H_