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

webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.cc

Index: webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.cc
diff --git a/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.cc b/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.cc
index 5c0aa1bd4507206de1cf3277c3f282438d3dc623..d411b18bf812768adfca3ade2481564d46c3ab28 100644
--- a/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.cc
+++ b/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.cc
@@ -152,6 +152,14 @@ static void RtpFragmentize(EncodedImage* encoded_image,
 
 H264EncoderImpl::H264EncoderImpl()
     : openh264_encoder_(nullptr),
+      width_(0),
+      height_(0),
+      max_frame_rate_(0.0f),
+      target_bps_(0),
+      max_bps_(0),
+      mode_(kRealtimeVideo),
+      frame_dropping_on_(false),
+      key_frame_interval_(0),
       number_of_cores_(0),
       encoded_image_callback_(nullptr),
       has_reported_init_(false),
@@ -263,11 +271,13 @@ int32_t H264EncoderImpl::RegisterEncodeCompleteCallback(
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-int32_t H264EncoderImpl::SetRates(uint32_t bitrate, uint32_t framerate) {
-  if (bitrate <= 0 || framerate <= 0) {
+int32_t H264EncoderImpl::SetRateAllocation(
+    const BitrateAllocation& bitrate_allocation,
+    uint32_t framerate) {
+  if (bitrate_allocation.get_sum_bps() <= 0 || framerate <= 0)
     return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
-  }
-  target_bps_ = bitrate * 1000;
+
+  target_bps_ = bitrate_allocation.get_sum_bps();
   max_frame_rate_ = static_cast<float>(framerate);
   quality_scaler_.ReportFramerate(framerate);