Add API to allow deducting bitrate from incoming estimates before the capacity is distributed among outgoing video streams. For example, this can be used to reserve space for audio streams.

BUG=
R=stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/10499004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5791 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/bitrate_controller/include/bitrate_controller.h

@@ -73,6 +73,8 @@ class BitrateController {
 
   // Changes the mode that was set in the constructor.
   virtual void EnforceMinBitrate(bool enforce_min_bitrate) = 0;
+
+  virtual void SetReservedBitrate(uint32_t reserved_bitrate_bps) = 0;
 };
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_BITRATE_CONTROLLER_INCLUDE_BITRATE_CONTROLLER_H_