Remove some recently fixed bugs from the known_issues file

Landing http://codereview.chromium.org/334026.

BUG=20825,23780,24200
TEST=none
Review URL: http://codereview.chromium.org/338039

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30174 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/data/reliability/known_crashes.txt

@@ -100,9 +100,6 @@ REGEX : npapi::plugininstance::npp_newstream___[^_]*___ipc::syncchannel::sendwit
 # 20793
 PREFIX : webpluginproxy::setwindowlessbuffer___child_process_logging::setactiveurl
 
-# 20825
-PREFIX : v8::internal::compiler::compile___v8::script::new___v8::script::compile___webcore::v8proxy::compilescript
-
 # 20915
 REGEX : ^base::messagepumpforio::schedulework___ucase_props_trieindex___canonicalize_map$
 PREFIX : base::messagepumpforio::schedulework___propsvectors___propsvectorstrie_index
@@ -139,8 +136,5 @@ SUBSTRING : webframeloaderclient::dispatchdidchangelocationwithinpage___webcore:
 # 23281
 REGEX : tabcontents::washidden___.*___tabcontents::~tabcontents
 
-# bug 23780
-PREFIX : v8::internal::mayaccessprecheck
-
 # bug 25689
 PREFIX : skia::crashforbitmapallocationfailure___skia::platformcanvas::platformcanvas___webpluginproxy::setwindowlessbuffer___webpluginproxy::updategeometry___webplugindelegatestub