Include cstdio for sscanf. This allows chromium to be build with gcc 4.9.
--- third_party/webrtc/modules/remote_bitrate_estimator/overuse_detector.cc.orig 2015-10-30 16:43:12.000000000 +0100
+++ third_party/webrtc/modules/remote_bitrate_estimator/overuse_detector.cc 2015-10-30 16:43:29.000000000 +0100
@@ -11,6 +11,7 @@
#include "webrtc/modules/remote_bitrate_estimator/overuse_detector.h"
#include <algorithm>
+#include <cstdio>
#include <sstream>
#include <math.h>
#include <stdlib.h>