Remove 49463 from known list as not seen in recent runs.

chrome/test/data/reliability/known_crashes.txt

 # This file contains known patterns of crash signatures. One pattern per line.
 #
 # A crash signature is the concatenation of the top N functions, delimited by
 # '___', in chrome.dll on the crash stack. All characters are lower case.
 #
 # We use crash signature patterns as our list of known crashes. A crash
 # signature pattern is a string that can be used to identify a known crash. We
 # use the notion of patterns because crashes with the same root cause can often
 # differ somewhat in their crash stacks. A pattern is intended to be a
 # generalized, yet still identifying, form of a particular crash. Usually a
@@ skipping 45 matching lines @@
 PREFIX : std::_tree<std::_tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,net::internal::clientsocketpoolbasehelper::group,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,net::internal::clientsocketpoolbasehelper::group> >,0> >::_eqrange___std::_tree<std::_tmap_traits<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,net::internal::clientsocketpoolbasehelper::group,std::less<std::basic_string<char,std::char_traits<char>,std::allocator<char> > >,std::allocator<std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const ,net::internal::clientsocketpoolbasehelper::group> >,0> >::erase___net::internal::clientsocketpoolbasehelper::onavailablesocketslot
 
 # 49271
 PREFIX : messageloop::posttask_helper___messageloop::posttask___disk_cache::inflightio::oniocomplete___disk_cache::backendio::executebackendoperation___messageloop::runtask___messageloop::dowork___base::messagepumpforio::dorunloop___base::messagepumpwin::run___messageloop::runinternal___messageloop::run___base::thread::run___base::thread::threadmain___`anonymous namespace'::threadfunc
 
 # 49384
 PREFIX : anonymous namespace'::cachecreator::docallback___`anonymous namespace'::cachecreator::oniocomplete___disk_cache::inflightbackendio::onoperationcomplete___disk_cache::inflightio::invokecallback___disk_cache::backgroundio::oniosignalled___messageloop::runtask___messageloop::dowork___base::messagepumpforio::dorunloop___base::messagepumpwin::run___messageloop::runinternal___messageloop::run___base::thread::run___base::thread::threadmain___`anonymous namespace'::threadfunc
 
 # 49409
 PREFIX : std::basic_string<char,std::char_traits<char>,std::allocator<char> >::assign___fieldtriallist::statestostring___browserrenderprocesshost::appendrenderercommandline___browserrenderprocesshost::init___renderviewhost::createrenderview___tabcontents::createrenderviewforrendermanager___renderviewhostmanager::initrenderview___renderviewhostmanager::creatependingrenderview___renderviewhostmanager::updaterendererstatefornavigate___renderviewhostmanager::navigate___tabcontents::navigatetopendingentry___navigationcontroller::navigatetopendingentry___navigationcontroller::loadentry___navigationcontroller::loadurl___browser::openurlatindex___browser::openurlfromtab___browser::openurl___automationprovider::navigatetourlblockuntilnavigationscomplete___automationprovider::navigatetourl___ipc
-
-# 49463
-PREFIX : ntdll!RtlRaiseStatus+0x26
-ntdll!RtlInitializeSListHead+0x94e6
-ntdll!RtlLeaveCriticalSection+0x1d
-chrome_2610000!ResourceMessageFilter::OnLoadFont+0x179 [c:\b\slave\chromium-rel-xp\build\src\chrome\browser\renderer_host\resource_message_filter.cc @ 716]
-chrome_2610000!IPC::MessageWithReply<Tuple1<tagLOGFONTW>,Tuple0>::Dispatch<ResourceMessageFilter,void (__thiscall ResourceMessageFilter::*)(tagLOGFONTW)>+0x7a [c:\b\slave\chromium-rel-xp\build\src\ipc\ipc_message_utils.h @ 1183]