media/cast/sender: Rename deadline_utilization to encoder_utilization.

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 3a304f6a2b14932f8ffbaf5768593c0c0efed336..a9190467edd6c5629b9158d4c29066ebde6c60c7 100644
--- a/media/cast/sender/fake_software_video_encoder.cc
+++ b/media/cast/sender/fake_software_video_encoder.cc
@@ -63,10 +63,10 @@ void FakeSoftwareVideoEncoder::Encode(
       std::max<size_t>(encoded_frame->data.size(), frame_size_), ' ');
 
   if (encoded_frame->dependency == EncodedFrame::KEY) {
-    encoded_frame->deadline_utilization = 1.0;
+    encoded_frame->encoder_utilization = 1.0;
     encoded_frame->lossy_utilization = 6.0;
   } else {
-    encoded_frame->deadline_utilization = 0.8;
+    encoded_frame->encoder_utilization = 0.8;
     encoded_frame->lossy_utilization = 0.8;
   }
 }