Fix mismatch between different NACK list lengths and packet buffers.

This is a second version of http://review.webrtc.org/1065006/ which passes the parameters via methods instead of via constructors.

BUG=1289

Review URL: https://webrtc-codereview.appspot.com/1065007

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3456 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/video_coding/main/test/test_util.h

@@ -22,6 +22,9 @@
 #include "module_common_types.h"
 #include "testsupport/fileutils.h"
 
+enum { kMaxNackListSize = 250 };
+enum { kMaxPacketAgeToNack = 450 };
+
 // Class used for passing command line arguments to tests
 class CmdArgs
 {