Update from https://crrev.com/316786

tools/valgrind/memcheck/suppressions.txt

 # There are four 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 # running overnight and removing outdated bugs/suppressions.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 2998 matching lines @@
    bug_388668
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN20data_reduction_proxy69DataReductionProxyUsageStatsTest_isDataReductionProxyUnreachable_Test8TestBodyEv
 }
 {
    bug_392912
    Memcheck:Uninitialized
    fun:_ZNK8SkStroke10strokePathERK6SkPathPS0_
    fun:_ZNK11SkStrokeRec11applyToPathEP6SkPathRKS0_
-   fun:_ZNK7SkPaint11getFillPathERK6SkPathPS0_PK6SkRect
-   fun:_ZNK6SkDraw8drawPathERK6SkPathRK7SkPaintPK8SkMatrixbb
+   fun:_ZNK7SkPaint11getFillPathERK6SkPathPS0_PK6SkRectf
+   fun:_ZNK6SkDraw8drawPathERK6SkPathRK7SkPaintPK8SkMatrixbbP9SkBlitter
    fun:_ZNK6SkDraw8drawPathERK6SkPathRK7SkPaintPK8SkMatrixb
    fun:_ZN14SkBitmapDevice8drawPathERK6SkDrawRK6SkPathRK7SkPaintPK8SkMatrixb
-   fun:_ZN8SkCanvas8drawPathERK6SkPathRK7SkPaint
 }
 {
    bug_392936
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base8internal20PostTaskAndReplyImpl16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEESA_
    fun:_ZN4base10WorkerPool16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEES9_b
    fun:_ZN3net16HostResolverImpl16LoopbackProbeJobC2ERKN4base7WeakPtrIS0_EE
    fun:_ZN3net16HostResolverImplC1ERKNS_12HostResolver7OptionsEPNS_6NetLogE
    fun:_ZN8chromeos24HostResolverImplChromeOSC1E13scoped_refptrIN4base16MessageLoopProxyEEPNS_19NetworkStateHandlerERKN3net12HostResolver7OptionsEPNS7_6NetLogE
@@ skipping 357 matching lines @@
 {
    bug_431209b
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN2ui9Clipboard6CreateEv
    fun:_ZN2ui9Clipboard19GetForCurrentThreadEv
    fun:_ZN2ui21ScopedClipboardWriterD1Ev
    fun:_ZN8remoting13ClipboardAura4Core20InjectClipboardEventERKNS_8protocol14ClipboardEventE
 }
 {
-   bug_431213
+   bug_431213_a
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN3gin22CreateFunctionTemplateIF*LocalINS6_16FunctionTemplateEEEPNS6_7IsolateEN4base8CallbackIT_EEi
    fun:_ZN3gin12_GLOBAL__N_114CallbackTraitsIMN*CreateTemplateEPN2v87IsolateES6_
    fun:_ZN3gin21ObjectTemplateBuilder9SetMethodIMN*0_RKN4base16BasicStringPieceISsEERKT_
    fun:_ZN*24GetObjectTemplateBuilderEPN2v87IsolateE
 }
 {
+   bug_431213_b
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN3gin22CreateFunctionTemplateIF*IsolateEN4base8CallbackIT_EEi
+   fun:_ZN3gin12_GLOBAL__N_114CallbackTraitsIF*
+   fun:_ZN3gin21ObjectTemplateBuilder9SetMethod*RKN4base16BasicStringPieceISsEERKT_
+   fun:_ZN4mojo2js*GetModuleEPN2v87IsolateE
+}
+{
+   bug_431213_c
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN3gin22CreateFunctionTemplateIF*IsolateEN4base8CallbackIT_EEi
+   fun:_ZN3gin12_GLOBAL__N_114CallbackTraitsI*
+   fun:_ZN3gin21ObjectTemplateBuilder9SetMethod*RKN4base16BasicStringPieceISsEERKT_
+   fun:_ZN10extensions19TestServiceProvider24GetObjectTemplateBuilderEPN2v87IsolateE
+}
+{
+   bug_431213_d
+   Memcheck:Leak
+   fun:_Znw*
+   fun:_ZN3gin22CreateFunctionTemplateIF*IsolateEN4base8CallbackIT_EEi
+   fun:_ZN3gin12_GLOBAL__N_114CallbackTraitsI*
+   fun:_ZN3gin21ObjectTemplateBuilder9SetMethod*RKN4base16BasicStringPieceISsEERKT_
+   fun:_ZN10extensions12_GLOBAL__N_111TestNatives24GetObjectTemplateBuilderEPN2v87IsolateE
+}
+{
    bug_436110
    Memcheck:Param
    socketcall.sendto(msg)
    fun:send
    fun:_ZN4mojo8embedder20PlatformChannelWriteENS0_14PlatformHandleEPKvm
    fun:_ZN4mojo6system12_GLOBAL__N_115RawChannelPosix11WriteNoLockEPmS3_
    fun:_ZN4mojo6system12_GLOBAL__N_115RawChannelPosix29OnFileCanWriteWithoutBlockingEi
    fun:_ZThn112_N4mojo6system12_GLOBAL__N_115RawChannelPosix29OnFileCanWriteWithoutBlockingEi
    fun:_ZN4base19MessagePumpLibevent21FileDescriptorWatcher29OnFileCanWriteWithoutBlockingEiPS0_
    fun:_ZN4base19MessagePumpLibevent22OnLibeventNotificationEisPv
@@ skipping 189 matching lines @@
    fun:_ZN4mojo8internal6Router26HandleIncomingMessageThunk6AcceptEPNS_7MessageE
    fun:_ZN7content32ApplicationSetupRequestValidator6AcceptEPN4mojo7MessageE
    fun:_ZN4mojo8internal22MessageHeaderValidator6AcceptEPNS_7MessageE
    fun:_ZN4mojo22ReadAndDispatchMessageENS_17MessagePipeHandleEPNS_15MessageReceiverEPb
    fun:_ZN4mojo8internal9Connector17ReadSingleMessageEPi
    fun:_ZN4mojo8internal9Connector24ReadAllAvailableMessagesEv
    fun:_ZN4mojo8internal9Connector13OnHandleReadyEi
    fun:_ZN4mojo8internal9Connector17CallOnHandleReadyEPvi
    fun:_ZN4mojo8internal12_GLOBAL__N_113OnHandleReadyEPNS_6common13HandleWatcherEPFvPviES5_i
 }
+{
+   bug_457557
+   Memcheck:Leak
+   fun:calloc
+   fun:pthread_setspecific
+   fun:_ZN4base8internal19ThreadLocalPlatform14SetValueInSlotEjPv
+   fun:_ZN4base18ThreadLocalPointerIvE3SetEPv
+   fun:_ZN4base18ThreadLocalBoolean3SetEb
+   fun:_ZN4base12_GLOBAL__N_112WorkerThread10ThreadMainEv
+   fun:_ZN4base12_GLOBAL__N_110ThreadFuncEPv
+}