Revert of Refactoring: Merge VideoSenderConfig and AudioSenderConfig.

media/cast/sender/fake_software_video_encoder.cc

Index: media/cast/sender/fake_software_video_encoder.cc
diff --git a/media/cast/sender/fake_software_video_encoder.cc b/media/cast/sender/fake_software_video_encoder.cc
index 7a24750939d76cf4469c1a97c41005b3f74a6d0c..a9190467edd6c5629b9158d4c29066ebde6c60c7 100644
--- a/media/cast/sender/fake_software_video_encoder.cc
+++ b/media/cast/sender/fake_software_video_encoder.cc
@@ -18,13 +18,11 @@
 namespace cast {
 
 FakeSoftwareVideoEncoder::FakeSoftwareVideoEncoder(
-    const FrameSenderConfig& video_config)
+    const VideoSenderConfig& video_config)
     : video_config_(video_config),
       next_frame_is_key_(true),
       frame_id_(FrameId::first()),
-      frame_size_(0) {
-  DCHECK_GT(video_config_.max_frame_rate, 0);
-}
+      frame_size_(0) {}
 
 FakeSoftwareVideoEncoder::~FakeSoftwareVideoEncoder() {}