Fix media log for complexity based buffering to use milliseconds.

Field has a label of "ms", but was actually being output in seconds.

BUG=none
TEST=manual

Change-Id: I24025ba0dc956697d8315c81aa940ea86937a013
Reviewed-on: https://chromium-review.googlesource.com/804616Reviewed-by: Chrome Cunningham <chcunningham@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521171}

media/renderers/video_renderer_impl.cc

@@ -976,7 +976,8 @@ void VideoRendererImpl::UpdateMaxBufferedFrames() {
     MEDIA_LOG(INFO, media_log_)
         << "Updating max buffered frames to " << max_buffered_frames
         << ", average frame duration: " << frame_duration.InMillisecondsF()
-        << "ms, average read duration: " << read_durations_.Average()
+        << "ms, average read duration: "
+        << read_durations_.Average().InMillisecondsF()
         << "ms, max read duration: " << read_durations_.max().InMillisecondsF()
         << "ms. [" << min_buffered_frames_ << ", " << max_buffered_frames_
         << "]";