Adds a new reliability crash to known_crashes.txt....

chrome/test/data/reliability/known_crashes.txt

Index: chrome/test/data/reliability/known_crashes.txt
===================================================================
--- chrome/test/data/reliability/known_crashes.txt	(revision 24221)
+++ chrome/test/data/reliability/known_crashes.txt	(working copy)
@@ -109,3 +109,7 @@
 # 20063
 PREFIX :
 npapi::plugininstance::npp_newstream___npapi::pluginstream::open___npapi::pluginstreamurl::didreceiveresponse___webplugindelegatestub::ondidreceiveresponse___ipc::messagewithtuple<tuple1<pluginmsg_didreceiveresponseparams> >::dispatch<webplugindelegatestub,void (__thiscall webplugindelegatestub::*)(pluginmsg_didreceiveresponseparams const &)>
+
+# 20200
+PREFIX : `anonymous namespace'::purecall___realloc___wtf::fastrealloc___webcore::htmltokenizer::enlargescriptbuffer___webcore::htmltokenizer::parsecomment___webcore::htmltokenizer::parsetag
+PREFIX : `anonymous namespace'::invalidparameter___realloc___wtf::fastrealloc___webcore::htmltokenizer::enlargescriptbuffer___webcore::htmltokenizer::parsecomment___webcore::htmltokenizer::parsetag