Valgrind: Suppress an occasional leak in MessageLoop::DeleteSoon().

tools/valgrind/memcheck/suppressions.txt

Index: tools/valgrind/memcheck/suppressions.txt
===================================================================
--- tools/valgrind/memcheck/suppressions.txt	(revision 86379)
+++ tools/valgrind/memcheck/suppressions.txt	(working copy)
@@ -4643,6 +4643,24 @@
    fun:_ZN7testing8internal35HandleExceptionsInMethodIfSupportedINS_4TestEvEET0_PT_MS4_FS3_vEPKc
 
 }
+{
+   bug_83835
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN11MessageLoop10DeleteSoonIN4base20MessageLoopProxyImplEEEvRKN15tracked_objects8LocationEPKT_
+   fun:_ZNK4base20MessageLoopProxyImpl10OnDestructEv
+   fun:_ZN4base22MessageLoopProxyTraits8DestructEPKNS_16MessageLoopProxyE
+   fun:_ZNK4base20RefCountedThreadSafeINS_16MessageLoopProxyENS_22MessageLoopProxyTraitsEE7ReleaseEv
+   fun:_ZN13scoped_refptrIN4base16MessageLoopProxyEED1Ev
+   fun:_ZN3net16HostResolverImpl3JobD1Ev
+   fun:_ZN4base20RefCountedThreadSafeIN3net16HostResolverImpl3JobENS_33DefaultRefCountedThreadSafeTraitsIS3_EEE14DeleteInternalEPKS3_
+   fun:_ZN4base33DefaultRefCountedThreadSafeTraitsIN3net16HostResolverImpl3JobEE8DestructEPKS3_
+   fun:_ZNK4base20RefCountedThreadSafeIN3net16HostResolverImpl3JobENS_33DefaultRefCountedThreadSafeTraitsIS3_EEE7ReleaseEv
+   fun:_ZN20RunnableMethodTraitsIN3net16HostResolverImpl3JobEE13ReleaseCalleeEPS2_
+   fun:_ZN14RunnableMethodIN3net16HostResolverImpl3JobEMS2_FvRKN4base9TimeTicksEjE6Tuple2IS4_jEE13ReleaseCalleeEv
+   fun:_ZN14RunnableMethodIN3net16HostResolverImpl3JobEMS2_FvRKN4base9TimeTicksEjE6Tuple2IS4_jEED0Ev
+   fun:_ZN4base12_GLOBAL__N_112WorkerThread10ThreadMainEv
+}
 #-----------------------------------------------------------------------
 # These only occur on our Google workstations
 {