Suppress valgrind leak from WebCore::CSSParser::createFloatingValueList.

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 # running overnight and removing outdated bugs/suppressions.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 1014 matching lines @@
    fun:_ZN4base19MessagePumpLibevent3RunEPNS_11MessagePump8DelegateE
    fun:_ZN11MessageLoop11RunInternalEv
    fun:_ZN11MessageLoop10RunHandlerEv
    fun:_ZN11MessageLoop3RunEv
    fun:_ZN4base6Thread3RunEP11MessageLoop
    fun:_ZN4base6Thread10ThreadMainEv
    fun:_Z10ThreadFuncPv
    fun:start_thread
    fun:clone
 }
+{
+   bug_23104
+   Memcheck:Leak
+   fun:_Znwj
+   fun:_ZN7WebCore9CSSParser23createFloatingValueListEv
+   fun:_Z10cssyyparsePv
+   fun:_ZN7WebCore9CSSParser10parseSheetEPNS_13CSSStyleSheetERKNS_6StringE
+   fun:_ZN7WebCore13CSSStyleSheet11parseStringERKNS_6StringEb
+   fun:_ZN7WebCore12parseUASheetERKNS_6StringE
+   fun:_ZN7WebCore12parseUASheetEPKcj
+   fun:_ZN7WebCore22loadSimpleDefaultStyleEv
+   fun:_ZN7WebCore16CSSStyleSelectorC1EPNS_8DocumentEPNS_14StyleSheetListEPNS_13CSSStyleSheetES6_PKN3WTF6VectorINS7_6RefPtrIS5_EELj0EEEbb
+   fun:_ZN7WebCore8Document6attachEv
+   fun:_ZN7WebCore5Frame11setDocumentEN3WTF10PassRefPtrINS_8DocumentEEE
+   fun:_ZN7WebCore11FrameLoader5beginERKNS_4KURLEbPNS_14SecurityOriginE
+   fun:_ZN7WebCore11FrameLoader4initEv
+   fun:_ZN7WebCore5Frame4initEv
+}