Revert of Refactoring: Merge VideoSenderConfig and AudioSenderConfig.

media/cast/sender/vp8_encoder.cc

Index: media/cast/sender/vp8_encoder.cc
diff --git a/media/cast/sender/vp8_encoder.cc b/media/cast/sender/vp8_encoder.cc
index 39c8971e0de999faa9054b410193e8101206cbb0..f6bad07231248d2afff4dc29893dc4375ddaa0c4 100644
--- a/media/cast/sender/vp8_encoder.cc
+++ b/media/cast/sender/vp8_encoder.cc
@@ -63,12 +63,12 @@
 
 }  // namespace
 
-Vp8Encoder::Vp8Encoder(const FrameSenderConfig& video_config)
+Vp8Encoder::Vp8Encoder(const VideoSenderConfig& video_config)
     : cast_config_(video_config),
       target_encoder_utilization_(
-          video_config.video_codec_params.number_of_encode_threads > 2
+          video_config.number_of_encode_threads > 2
               ? kHiTargetEncoderUtilization
-              : (video_config.video_codec_params.number_of_encode_threads > 1
+              : (video_config.number_of_encode_threads > 1
                      ? kMidTargetEncoderUtilization
                      : kLoTargetEncoderUtilization)),
       key_frame_requested_(true),
@@ -79,10 +79,8 @@
           base::TimeDelta::FromMicroseconds(kEncodingSpeedAccHalfLife)),
       encoding_speed_(kHighestEncodingSpeed) {
   config_.g_timebase.den = 0;  // Not initialized.
-  DCHECK_LE(cast_config_.video_codec_params.min_qp,
-            cast_config_.video_codec_params.max_cpu_saver_qp);
-  DCHECK_LE(cast_config_.video_codec_params.max_cpu_saver_qp,
-            cast_config_.video_codec_params.max_qp);
+  DCHECK_LE(cast_config_.min_qp, cast_config_.max_cpu_saver_qp);
+  DCHECK_LE(cast_config_.max_cpu_saver_qp, cast_config_.max_qp);
 
   thread_checker_.DetachFromThread();
 }
@@ -112,7 +110,7 @@
                << frame_size.ToString();
       config_.g_w = frame_size.width();
       config_.g_h = frame_size.height();
-      config_.rc_min_quantizer = cast_config_.video_codec_params.min_qp;
+      config_.rc_min_quantizer = cast_config_.min_qp;
       if (vpx_codec_enc_config_set(&encoder_, &config_) == VPX_CODEC_OK)
         return;
       DVLOG(1) << "libvpx rejected the attempt to use a smaller frame size in "
@@ -132,7 +130,7 @@
   CHECK_EQ(vpx_codec_enc_config_default(vpx_codec_vp8_cx(), &config_, 0),
            VPX_CODEC_OK);
 
-  config_.g_threads = cast_config_.video_codec_params.number_of_encode_threads;
+  config_.g_threads = cast_config_.number_of_encode_threads;
   config_.g_w = frame_size.width();
   config_.g_h = frame_size.height();
   // Set the timebase to match that of base::TimeDelta.
@@ -149,8 +147,8 @@
   config_.rc_resize_allowed = 0;  // TODO(miu): Why not?  Investigate this.
   config_.rc_end_usage = VPX_CBR;
   config_.rc_target_bitrate = bitrate_kbit_;
-  config_.rc_min_quantizer = cast_config_.video_codec_params.min_qp;
-  config_.rc_max_quantizer = cast_config_.video_codec_params.max_qp;
+  config_.rc_min_quantizer = cast_config_.min_qp;
+  config_.rc_max_quantizer = cast_config_.max_qp;
   // TODO(miu): Revisit these now that the encoder is being successfully
   // micro-managed.
   config_.rc_undershoot_pct = 100;
@@ -353,7 +351,7 @@
     double actual_encoding_speed =
         encoding_speed_ +
         kEquivalentEncodingSpeedStepPerQpStep *
-            std::max(0, quantizer - cast_config_.video_codec_params.min_qp);
+            std::max(0, quantizer - cast_config_.min_qp);
     double adjusted_encoding_speed = actual_encoding_speed *
                                      encoded_frame->encoder_utilization /
                                      target_encoder_utilization_;
@@ -372,13 +370,12 @@
       next_encoding_speed = kHighestEncodingSpeed;
       next_min_qp =
           static_cast<int>(remainder / kEquivalentEncodingSpeedStepPerQpStep +
-                           cast_config_.video_codec_params.min_qp + 0.5);
-      next_min_qp = std::min(next_min_qp,
-                             cast_config_.video_codec_params.max_cpu_saver_qp);
+                           cast_config_.min_qp + 0.5);
+      next_min_qp = std::min(next_min_qp, cast_config_.max_cpu_saver_qp);
     } else {
       next_encoding_speed =
           std::max<double>(kLowestEncodingSpeed, next_encoding_speed) + 0.5;
-      next_min_qp = cast_config_.video_codec_params.min_qp;
+      next_min_qp = cast_config_.min_qp;
     }
     if (encoding_speed_ != static_cast<int>(next_encoding_speed)) {
       encoding_speed_ = static_cast<int>(next_encoding_speed);