Measure encoding time on encode callbacks.

webrtc/video_send_stream.h

Index: webrtc/video_send_stream.h
diff --git a/webrtc/video_send_stream.h b/webrtc/video_send_stream.h
index 83a96d3fed02d496358ad0a9df8bcfa22d2b4242..20d88c436c0bc84b815722388aa964c3b53acf50 100644
--- a/webrtc/video_send_stream.h
+++ b/webrtc/video_send_stream.h
@@ -91,6 +91,11 @@ class VideoSendStream : public SendStream {
       // sources anymore.
       bool internal_source = false;
 
+      // Allow 100% encoder utilization. Used for HW encoders where CPU isn't
+      // expected to be the limiting factor, but a chip could be running at
+      // 30fps (for example) exactly.
+      bool full_overuse_time = false;
+
       // Uninitialized VideoEncoder instance to be used for encoding. Will be
       // initialized from inside the VideoSendStream.
       VideoEncoder* encoder = nullptr;