Add a suppression for HALCADClientListener::HALCADClientListener().

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 # running overnight and removing outdated bugs/suppressions.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 1167 matching lines @@
    fun:_GLOBAL__I__ZNSt3tr112_GLOBAL__N_16ignoreE
    fun:_ZN16ImageLoaderMachO18doModInitFunctionsERKN11ImageLoader11LinkContextE
    fun:_ZN11ImageLoader23recursiveInitializationERKNS_11LinkContextEj
    fun:_ZN11ImageLoader15runInitializersERKNS_11LinkContextE
    fun:_ZN4dyld24initializeMainExecutableEv
    fun:_ZN4dyld5_mainEPK11mach_headermiPPKcS5_S5_
    fun:_ZN13dyldbootstrap5startEPK11mach_headeriPPKcl
    fun:_dyld_start
    obj:*
 }
+{
+   bug_46186
+   Memcheck:Leak
+   fun:malloc_zone_malloc
+   fun:_ZN4base12_GLOBAL__N_137oom_killer_cfallocator_system_defaultElmPv
+   fun:_CFRuntimeCreateInstance
+   fun:CFRunLoopSourceCreate
+   fun:MSHCreateMIGServerSource
+   fun:_ZN20HALCADClientListenerC2EPFlmmPK26AudioObjectPropertyAddressPvES3_
+   fun:_ZN12HALCADClient19AddPropertyListenerEmPK26AudioObjectPropertyAddressPFlmmS2_PvES3_
+   fun:_ZN16HALDefaultDevice22InstallServerListenersEv
+   fun:_ZN16HALDefaultDevice10InitializeEv
+   fun:_ZN9HALSystem16CheckOutInstanceEv
+   fun:AudioObjectAddPropertyListener
+   fun:_ZN10AQMEDeviceC2EmPK27AudioStreamBasicDescriptionPK18AudioChannelLayout
+   fun:_Z11NewAQIONodembPK27AudioStreamBasicDescriptionPK18AudioChannelLayout
+   fun:_ZN15AQIONodeManager13_FindAQIONodeEmbb
+   fun:_ZN15AQIONodeManager12FindAQIONodeEmbb
+   fun:_ZN16AudioQueueObject15DoIONodeConnectERK25AudioQueueStreamSpecifierPK27AudioStreamBasicDescriptionPK18AudioChannelLayout
+   fun:_ZN16AudioQueueObject13EnqueueBufferEP16AudioQueueBufferjPK28AudioStreamPacketDescriptionjjjPK24AudioQueueParameterEventRK11AQTimeStampPS8_
+   fun:AQServer_EnqueueBuffer
+   fun:AudioQueueEnqueueBufferWithParameters
+   fun:AudioQueueEnqueueBuffer
+   fun:_ZN28PCMQueueOutAudioOutputStream5StartEPN17AudioOutputStream19AudioSourceCallbackE
+   fun:_ZN17AudioRendererHost14IPCAudioSource4PlayEv
+}