Extract bitrate allocation of spatial/temporal layers out of codec impl.

webrtc/video/video_encoder_unittest.cc

Index: webrtc/video/video_encoder_unittest.cc
diff --git a/webrtc/video/video_encoder_unittest.cc b/webrtc/video/video_encoder_unittest.cc
index 5f6f17e7b49e2da1655df6b4b0d5722e31e39dfb..57d17a0c2223da18b0aa0573afb3fe6251c81819 100644
--- a/webrtc/video/video_encoder_unittest.cc
+++ b/webrtc/video/video_encoder_unittest.cc
@@ -10,6 +10,7 @@
 
 #include "webrtc/video_encoder.h"
 
+#include "webrtc/modules/video_coding/codecs/vp8/temporal_layers.h"
 #include "webrtc/modules/video_coding/include/video_codec_interface.h"
 #include "webrtc/modules/video_coding/include/video_error_codes.h"
 #include "webrtc/test/gtest.h"
@@ -117,6 +118,7 @@ class VideoEncoderSoftwareFallbackWrapperTest : public ::testing::Test {
   VideoEncoderSoftwareFallbackWrapper fallback_wrapper_;
   VideoCodec codec_ = {};
   std::unique_ptr<VideoFrame> frame_;
+  TemporalLayersFactory tl_factory_;
 };
 
 void VideoEncoderSoftwareFallbackWrapperTest::EncodeFrame() {
@@ -139,6 +141,7 @@ void VideoEncoderSoftwareFallbackWrapperTest::UtilizeFallbackEncoder() {
   codec_.maxFramerate = 30;
   codec_.width = kWidth;
   codec_.height = kHeight;
+  codec_.codecSpecific.VP8.tl_factory = &tl_factory_;
   fake_encoder_.init_encode_return_code_ = WEBRTC_VIDEO_CODEC_ERROR;
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
             fallback_wrapper_.InitEncode(&codec_, 2, kMaxPayloadSize));
@@ -157,6 +160,7 @@ void VideoEncoderSoftwareFallbackWrapperTest::FallbackFromEncodeRequest() {
   codec_.maxFramerate = 30;
   codec_.width = kWidth;
   codec_.height = kHeight;
+  codec_.codecSpecific.VP8.tl_factory = &tl_factory_;
   fallback_wrapper_.InitEncode(&codec_, 2, kMaxPayloadSize);
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.SetRates(300, 30));
   EXPECT_EQ(1, fake_encoder_.init_encode_count_);