Fix MediaRecorder bitrate configuration bug

content/renderer/media/video_track_recorder.cc

Index: content/renderer/media/video_track_recorder.cc
diff --git a/content/renderer/media/video_track_recorder.cc b/content/renderer/media/video_track_recorder.cc
index 6a2e68f42a56c7bb8b374015fed6b9c4a70ba211..6d2dfcf97dfc4799df0f024ce7c766d4008c1da3 100644
--- a/content/renderer/media/video_track_recorder.cc
+++ b/content/renderer/media/video_track_recorder.cc
@@ -292,9 +292,9 @@ void VpxEncoder::ConfigureEncoding(const gfx::Size& size) {
   DCHECK_EQ(240u, codec_config_.g_h);
   DCHECK_EQ(256u, codec_config_.rc_target_bitrate);
   // Use the selected bitrate or adjust default bit rate to account for the
-  // actual size.
+  // actual size.  Note: |rc_target_bitrate| units are kbit per second.
   if (bits_per_second_ > 0) {
-    codec_config_.rc_target_bitrate = bits_per_second_;
+    codec_config_.rc_target_bitrate = bits_per_second_ / 1000;
   } else {
     codec_config_.rc_target_bitrate = size.GetArea() *
                                       codec_config_.rc_target_bitrate /