Suppress a leak in WebKit

tools/valgrind/memcheck/suppressions.txt

 # There are three kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 3053 matching lines @@
    fun:_ZN7WebCore8Document13implicitCloseEv
    fun:_ZN7WebCore11FrameLoader22checkCallImplicitCloseEv
    fun:_ZN7WebCore11FrameLoader14checkCompletedEv
    fun:_ZN7WebCore11FrameLoader15finishedParsingEv
    fun:_ZN7WebCore8Document15finishedParsingEv
    fun:_ZN7WebCore10HTMLParser8finishedEv
    fun:_ZN7WebCore13HTMLTokenizer3endEv
    fun:_ZN7WebCore13HTMLTokenizer6finishEv
 }
 
+{
+   bug_46144
+   Memcheck:Leak
+   fun:malloc
+   fun:_ZN3WTF10fastMallocEj
+   fun:_ZN3WTF13FastAllocBasenwEj
+   fun:_ZN3WTF20ThreadIdentifierData10initializeEj
+}