Let ViEEncoder handle resolution changes.

webrtc/call/bitrate_estimator_tests.cc

Index: webrtc/call/bitrate_estimator_tests.cc
diff --git a/webrtc/call/bitrate_estimator_tests.cc b/webrtc/call/bitrate_estimator_tests.cc
index 2896c67f37d0dad443f05918c68b0770b8f111e0..3ece04d2a63768046b456034728cc549d02eea0b 100644
--- a/webrtc/call/bitrate_estimator_tests.cc
+++ b/webrtc/call/bitrate_estimator_tests.cc
@@ -127,7 +127,7 @@ class BitrateEstimatorTest : public test::CallTest {
     video_send_config_.encoder_settings.payload_name = "FAKE";
     video_send_config_.encoder_settings.payload_type =
         kFakeVideoSendPayloadType;
-    video_encoder_config_.streams = test::CreateVideoStreams(1);
+    test::FillEncoderConfiguration(1, &video_encoder_config_);
 
     receive_config_ = VideoReceiveStream::Config(receive_transport_.get());
     // receive_config_.decoders will be set by every stream separately.
@@ -175,10 +175,9 @@ class BitrateEstimatorTest : public test::CallTest {
       send_stream_ = test_->sender_call_->CreateVideoSendStream(
           test_->video_send_config_.Copy(),
           test_->video_encoder_config_.Copy());
-      RTC_DCHECK_EQ(1u, test_->video_encoder_config_.streams.size());
+      RTC_DCHECK_EQ(1u, test_->video_encoder_config_.number_of_streams);
       frame_generator_capturer_.reset(test::FrameGeneratorCapturer::Create(
-          test_->video_encoder_config_.streams[0].width,
-          test_->video_encoder_config_.streams[0].height, 30,
+          kDefaultWidth, kDefaultHeight, kDefaultFramerate,
           Clock::GetRealTimeClock()));
       send_stream_->SetSource(frame_generator_capturer_.get());
       send_stream_->Start();