Add a suppression for a bad condition check

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 # running overnight and removing outdated bugs/suppressions.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 1242 matching lines @@
    fun:_ZN10JSONWriter15BuildJSONStringEPK5Valueib
    fun:_ZN10JSONWriter15BuildJSONStringEPK5Valueib
    fun:_ZN10JSONWriter15BuildJSONStringEPK5Valueib
    fun:_ZN10JSONWriter23WriteWithOptionalEscapeEPK5ValuebbPSs
    fun:_ZN10JSONWriter5WriteEPK5ValuebPSs
    fun:_ZN25JSONStringValueSerializer9SerializeERK5Value
    fun:_ZN11PrefService13SerializeDataEPSs
    fun:_ZN11PrefService19SavePersistentPrefsEv
    fun:_ZN16browser_shutdown8ShutdownEv
 }
+{
+   bug_22702_a
+   Memcheck:Cond
+   fun:_ZN7WebCore23V8AbstractEventListener18invokeEventHandlerEN2v86HandleINS1_7ContextEEEPNS_5EventENS2_INS1_5ValueEEEb
+   fun:_ZN7WebCore23V8AbstractEventListener11handleEventEPNS_5EventEb
+   ...
+   fun:_ZN7WebCore8Document15finishedParsingEv
+}
+{
+   bug_22702_b
+   Memcheck:Cond
+   fun:_ZN7WebCore23V8AbstractEventListener18invokeEventHandlerEN2v86HandleINS1_7ContextEEEPNS_5EventENS2_INS1_5ValueEEEb
+   fun:_ZN7WebCore23V8AbstractEventListener11handleEventEPNS_5EventEb
+   fun:_ZN7WebCore4Node17handleLocalEventsEPNS_5EventEb
+   fun:_ZN7WebCore4Node20dispatchGenericEventEN3WTF10PassRefPtrINS_5EventEEE
+   fun:_ZN7WebCore4Node13dispatchEventEN3WTF10PassRefPtrINS_5EventEEERi
+   fun:_ZN7WebCore12NodeInternal21dispatchEventCallbackERKN2v89ArgumentsE
+   fun:_ZN2v88internal21Builtin_HandleApiCallENS0_9ArgumentsE
+}