Revert 99666 (sync tests started failing on mac10.6:

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
===================================================================
--- tools/valgrind/memcheck/suppressions.txt	(revision 99676)
+++ tools/valgrind/memcheck/suppressions.txt	(working copy)
@@ -2239,6 +2239,18 @@
    fun:_ZN4base6Thread10ThreadMainEv
 }
 {
+   bug_46161
+   Memcheck:Leak
+   fun:_Znw*
+   fun:*DnsReloadTimer7ExpiredEv
+   fun:_ZN3net24DnsReloadTimerHasExpiredEv
+   fun:_ZN3net22SystemHostResolverProcERKSsNS_13AddressFamilyEiPNS_11AddressListEPi
+   fun:_ZN3net*15ResolveAddrInfoEPNS_16HostResolverProc*
+   fun:_ZN3net16HostResolverImpl3Job8DoLookup*
+   fun:_Z16DispatchToMethodIN3net16HostResolverImpl*
+   fun:_ZN14RunnableMethodIN3net16HostResolverImpl*
+}
+{
    bug_46250
    Memcheck:Leak
    fun:_Znw*
@@ -4792,19 +4804,6 @@
    fun:_ZN3net16HttpStreamParser21DoReadHeadersCompleteEi
 }
 {
-   bug_89553
-   Memcheck:Leak
-   fun:_Znw*
-   fun:_ZN12_GLOBAL__N_111DnsReloader11MaybeReloadEv
-   fun:_ZN3net22DnsReloaderMaybeReloadEv
-   fun:_ZN3net22SystemHostResolverProcERKSsNS_13AddressFamilyEiPNS_11AddressListEPi
-   ...
-   fun:_ZN3net*15ResolveAddrInfoEPNS_16HostResolverProc*
-   fun:_ZN3net16HostResolverImpl3Job8DoLookup*
-   fun:_Z16DispatchToMethodIN3net16HostResolverImpl*
-   fun:_ZN14RunnableMethodIN3net16HostResolverImpl*
-}
-{
    bug_89677
    Memcheck:Leak
    fun:_Znw*