Read the number of TLs for VP9 too + cleanup

webrtc/video/video_loopback.cc

Index: webrtc/video/video_loopback.cc
diff --git a/webrtc/video/video_loopback.cc b/webrtc/video/video_loopback.cc
index 0dceea82e6ea45e5f85bbfa7e5844036ac7a9956..0c06f85fccd9e109a32f48c5d7c614754ace7fa7 100644
--- a/webrtc/video/video_loopback.cc
+++ b/webrtc/video/video_loopback.cc
@@ -10,18 +10,14 @@
 
 #include <stdio.h>
 
-#include <map>
-
 #include "gflags/gflags.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #include "webrtc/test/field_trial.h"
 #include "webrtc/test/run_test.h"
-#include "webrtc/typedefs.h"
 #include "webrtc/video/video_quality_test.h"
 
 namespace webrtc {
-
 namespace flags {
 
 DEFINE_int32(width, 640, "Video width.");