Add a suppression for a bad condition check

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
diff --git a/tools/valgrind/memcheck/suppressions.txt b/tools/valgrind/memcheck/suppressions.txt
index 498cd6a1921fc66e20073bc7becb8fb151c25e14..ed8e3728bc4bc30b5247a4e42b42c86e1ed9998f 100644
--- a/tools/valgrind/memcheck/suppressions.txt
+++ b/tools/valgrind/memcheck/suppressions.txt
@@ -1260,3 +1260,22 @@
    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
+}