Valgrind reports leaks in MimeTypeTests on Mac

tools/valgrind/memcheck/suppressions_mac.txt

 # There are three kinds of suppressions in this file:
 # 1. Third party stuff we have no control over.
 #
 # 2. Intentional unit test errors, 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.
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 1971 matching lines @@
    fun:_ZNSt8_Rb_treeIjSt4pairIKjiESt10_Select1stIS2_ESt4lessIjESaIS2_EE11_M_get_nodeEv
    fun:_ZNSt8_Rb_treeIjSt4pairIKjiESt10_Select1stIS2_ESt4lessIjESaIS2_EE14_M_create_nodeERKS2_
    fun:_ZNSt8_Rb_treeIjSt4pairIKjiESt10_Select1stIS2_ESt4lessIjESaIS2_EE9_M_insertEPSt18_Rb_tree_node_baseSA_RKS2_
    fun:_ZNSt8_Rb_treeIjSt4pairIKjiESt10_Select1stIS2_ESt4lessIjESaIS2_EE13insert_uniqueERKS2_
    fun:_ZNSt8_Rb_treeIjSt4pairIKjiESt10_Select1stIS2_ESt4lessIjESaIS2_EE13insert_uniqueESt17_Rb_tree_iteratorIS2_ERKS2_
    fun:_ZNSt3mapIjiSt4lessIjESaISt4pairIKjiEEE6insertESt17_Rb_tree_iteratorIS4_ERKS4_
    fun:_ZNSt3mapIjiSt4lessIjESaISt4pairIKjiEEEixERS3_
    fun:_ZN18RenderWidgetHelper17AllocTransportDIBEmbPN4base14FileDescriptorE
    fun:_ZN19RenderMessageFilter19OnAllocTransportDIBEmbPN4base14FileDescriptorE
 }
+{
+   bug_105022
+   Memcheck:Leak
+   fun:malloc_zone_malloc
+   fun:malloc_set_zone_name
+   fun:init__zone0
+   fun:setenv$UNIX2003
+   fun:_ZN12_GLOBAL__N_115EnvironmentImpl10SetVarImplEPKcRKSs
+   fun:_ZN12_GLOBAL__N_115EnvironmentImpl6SetVarEPKcRKSs
+   fun:_Z18AppendToPythonPathRK8FilePath
+   fun:_ZN3net10TestServer13SetPythonPathEv
+   fun:_ZN3net10TestServer5StartEv
+   fun:_ZN12_GLOBAL__N_132MimeTypeTests_MimeTypeTests_Test8TestBodyEv
+}