[reliability] Add crash signature for crash in webkit_glue::DataSourceInitDone

chrome/test/data/reliability/known_crashes.txt

Index: chrome/test/data/reliability/known_crashes.txt
===================================================================
--- chrome/test/data/reliability/known_crashes.txt	(revision 94140)
+++ chrome/test/data/reliability/known_crashes.txt	(working copy)
@@ -195,5 +195,8 @@
 # 89697
 PREFIX: `anonymous namespace'::purecall____purecall___renderviewhost::onmessagereceived___browserrenderprocesshost::onchannelerror___`anonymous namespace'::taskclosureadapter::run___messageloop::runtask
 
+# 90393
+PREFIX: webkit_glue::datasourceinitdone___base::internal::invoker3<0,base::internal::invokerstorage3<void (__cdecl*)(callbackrunner<tuple1<webkit_glue::webdatasource *> > *,base::callback<void __cdecl(enum media::pipelinestatus,media::datasource *)> const &,scoped_refptr<webkit_glue::webdatasource> const &,enum media::pipelinestatus),callbackrunner<tuple1<webkit_glue::webdatasource *> > *,base::callback<void __cdecl(enum media::pipelinestatus,media::datasource *)>,scoped_refptr<webkit_glue::webdatasource> >,void (__cdecl*)(callbackrunner<tuple1<webkit_glue::webdatasource *> > *,base::callback<void __cdecl(enum media::pipelinestatus,media::datasource *)> const &,scoped_refptr<webkit_glue::webdatasource> const &,enum media::pipelinestatus)>::doinvoke___webkit_glue::buffereddatasource::doneinitialization_locked___webkit_glue::buffereddatasource::httpinitialstartcallback
+
 # 90553
 PREFIX: v8::internal::safepointentry::hasregisters___v8::internal::optimizedframe::iterate___v8::internal::isolate::iterate___v8::internal::isolate::iterate