Update from https://crrev.com/312398

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 # running overnight and removing outdated bugs/suppressions.
 #-----------------------------------------------------------------------
 
 # 1. Third party stuff we have no control over.
 {
    FIXME mac kevent libevent probably needs valgrind hooks
    Memcheck:Param
    kevent(changelist)
    fun:kevent
    fun:event_base_new
 }
 {
    # CoreAudio leak.  See http://crbug.com/9351
    bug_9351
    Memcheck:Leak
    ...
-   fun:_ZN12HALCADClient19AddPropertyListenerEmPK26AudioObjectPropertyAddressPFlmmS2_PvES3_
+   fun:_ZN12HALCADClient19AddPropertyListenerE*26AudioObjectPropertyAddressP*
    ...
    fun:_ZN9HALSystem16CheckOutInstanceEv
    ...
 }
 {
    bug_18215
    Memcheck:Uninitialized
    fun:_DPSNextEvent
    fun:-[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
    fun:-[NSApplication run]
@@ skipping 61 matching lines @@
 # run of each reboot.  See also issues 105525, 257276, 340847.
 {
    bug_257276_b
    Memcheck:Leak
    fun:malloc_zone_malloc
    ...
    fun:setCursorFromBundle
    fun:CoreCursorSet
    fun:-[NSCursor set]
 }
+{
+   bug_379331
+   Memcheck:Uninitialized
+   fun:x_zone_size
+   fun:find_registered_purgeable_zone
+   fun:malloc_make_purgeable
+   ...
+   fun:setCursorFromBundle
+   fun:CoreCursorSet
+   fun:-[NSCursor set]
+   fun:_ZN12_GLOBAL__N_116ForceSystemLeaksEv
+}
+{
+   FIXME initImagePng leaks from an unknown module
+   Memcheck:Leak
+   fun:malloc_zone_malloc
+   fun:_CFRuntimeCreateInstance
+   fun:CFNumberCreate
+   fun:get_colorspace
+   fun:initImagePng
+   obj:*
+   obj:/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/ImageIO
+   obj:/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
+}
 
 # 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.
 {
    # Mac Sandbox test cases are registered in a global map.  This code is only
    # used in the unit test binary.
    Mac_Sandbox_Intentional_Leak1
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN7content8internal19RegisterSandboxTestINS_*
@@ skipping 73 matching lines @@
   fun:_ZN4base17LoadNativeLibrary*
   fun:_ZN3gfx26InitializeStaticGLBindings*
   fun:_ZN3gfx9GLSurface30InitializeOneOffImplementation*
   fun:_ZN3gfx9GLSurface24InitializeOneOffForTestsEv
 }
 {
    bug_380568
    Memcheck:Leak
    fun:calloc
    fun:_internal_class_createInstanceFromZone
-   fun:_internal_class_createInstance
+   ...
    fun:NSAllocateObject
-   fun:+[NSObject(NSObject) alloc]
+   ...
    fun:-[VideoCaptureDeviceQTKit initWithFrameReceiver:]
    fun:_ZN5media21VideoCaptureDeviceMac4InitENS_18VideoCaptureDevice4Name14CaptureApiTypeE
    fun:_ZN5media28VideoCaptureDeviceFactoryMac6CreateERKNS_18VideoCaptureDevice4NameE
    fun:_ZN5media45VideoCaptureDeviceTest_OpenInvalidDevice_Test8TestBodyEv
 }
 {
    bug_385604_b
    Memcheck:Leak
    fun:calloc
    fun:_ZN18hb_object_header_t6createEj
@@ skipping 28 matching lines @@
    fun:_ZN7content45PluginLoaderPosixTest_PluginLaunchFailed_TestC1Ev
    fun:_ZN7testing8internal15TestFactoryImplIN7content45PluginLoaderPosixTest_PluginLaunchFailed_TestEE10CreateTestEv
 }
 {
    bug_437807
    Memcheck:Leak
    ...
    fun:_ZN4base3mac30PathForFrameworkBundleResourceEPK10__CFString
    fun:_ZN3gin13IsolateHolder14LoadV8SnapshotEv
 }