MediaRecorder: wire the bitRate settings in Blink and content (2nd go)

content/renderer/media/media_recorder_handler.h

Index: content/renderer/media/media_recorder_handler.h
diff --git a/content/renderer/media/media_recorder_handler.h b/content/renderer/media/media_recorder_handler.h
index cc50c84ee84c9a371a423581f5faa614f16a9dca..1e31a5f5c9c7a1902ea837f29f1ce131b7300ca7 100644
--- a/content/renderer/media/media_recorder_handler.h
+++ b/content/renderer/media/media_recorder_handler.h
@@ -53,7 +53,9 @@ class CONTENT_EXPORT MediaRecorderHandler final
   bool initialize(blink::WebMediaRecorderHandlerClient* client,
                   const blink::WebMediaStream& media_stream,
                   const blink::WebString& type,
-                  const blink::WebString& codecs) override;
+                  const blink::WebString& codecs,
+                  int32_t audio_bits_per_second,
+                  int32_t video_bits_per_second) override;
   bool start() override;
   bool start(int timeslice) override;
   void stop() override;
@@ -81,6 +83,10 @@ class CONTENT_EXPORT MediaRecorderHandler final
   // Bound to the main render thread.
   base::ThreadChecker main_render_thread_checker_;
 
+  // Sanitized video and audio bitrate settings passed on initialize().
+  int32_t video_bits_per_second_;
+  int32_t audio_bits_per_second_;
+
   // Force using VP9 for video encoding, otherwise VP8 will be used by default.
   bool use_vp9_;