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

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 # running overnight and removing outdated bugs/suppressions.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 4625 matching lines @@
 }
 {
    bug_83638
    Memcheck:Leak
    fun:_Znw*
    fun:*DownloadManagerTest_*_Test8TestBodyEv
    fun:_ZN7testing8internal38HandleSehExceptionsInMethodIfSupportedINS_4TestEvEET0_PT_MS4_FS3_vEPKc
    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
 {
    bug_todo_freeres
    Memcheck:Free
    fun:free
    fun:__libc_freeres
    fun:_vgnU_freeres
    fun:_Exit
    fun:exit
 }
 {
    bug_todo_getdelim
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    ...
    fun:call_init
    fun:_dl_init
 }