Update from https://crrev.com/327068

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 # running overnight and removing outdated bugs/suppressions.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 2943 matching lines @@
    fun:_ZN5blink15ResourceFetcher10fetchImageERNS_12FetchRequestE
    fun:_ZN5blink11ImageLoader19doUpdateFromElementEb
    fun:_ZN5blink11ImageLoader4Task3runEv
 }
 {
    bug_386418
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base8internal20PostTaskAndReplyImpl16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEESA_
    fun:_ZN4base10WorkerPool16PostTaskAndReplyERKN15tracked_objects8LocationERKNS_8CallbackIFvvEEES9_b
-   fun:_ZN3net16HostResolverImpl16LoopbackProbeJobC1ERKN4base7WeakPtrIS0_EE
-   fun:_ZN3net16HostResolverImplC1ERKNS_12HostResolver7OptionsEPNS_6NetLogE
-   fun:_ZN8chromeos24HostResolverImplChromeOSC1E13*
+   fun:_ZN3net16HostResolverImpl16LoopbackProbeJob*
+   fun:_ZN3net16HostResolverImplC*
 }
 {
    bug_387993
    Memcheck:Uninitialized
    fun:_ZN11SkBaseMutex7acquireEv
    fun:_ZN18SkAutoMutexAcquireC2EP11SkBaseMutex
    fun:_ZN18SkAutoMutexAcquireC1EP11SkBaseMutex
    fun:_ZN12SkGlyphCache10VisitCacheEP10SkTypefacePK12SkDescriptorPFbPKS_PvES7_
    fun:_ZN12SkGlyphCache11DetachCacheEP10SkTypefacePK12SkDescriptor
    fun:_ZL14DetachDescProcP10SkTypefacePK12SkDescriptorPv
@@ skipping 28 matching lines @@
    fun:_ZThn32_N5blink21InspectorRuntimeAgent8evaluateEPN3WTF6String*
    fun:_ZN5blink30InspectorBackendDispatcherImpl16Runtime_evaluateElPNS_10JSONObjectEPNS_9JSONArrayE
    fun:_ZN5blink30InspectorBackendDispatcherImpl8dispatchERKN3WTF6StringE
    fun:_ZN5blink25WorkerInspectorController27dispatchMessageFromFrontendERKN3WTF6StringE
    fun:_ZN5blinkL30dispatchOnInspectorBackendTaskEPNS_16ExecutionContextERKN3WTF6StringE
 }
 {
    bug_388668
    Memcheck:Leak
    fun:_Znw*
-   fun:_ZN20data_reduction_proxy69DataReductionProxyUsageStatsTest_isDataReductionProxyUnreachable_Test8TestBodyEv
+   fun:_ZN20data_reduction_proxy69DataReductionProxyBypassStatsTest_isDataReductionProxyUnreachable_Test8TestBodyEv
 }
 {
    bug_392912
    Memcheck:Uninitialized
    fun:_ZNK8SkStroke10strokePathERK6SkPathPS0_
    fun:_ZNK11SkStrokeRec11applyToPathEP6SkPathRKS0_
    fun:_ZNK7SkPaint11getFillPathERK6SkPathPS0_PK6SkRectf
    fun:_ZNK6SkDraw8drawPathERK6SkPathRK7SkPaintPK8SkMatrixbbP9SkBlitter
    fun:_ZNK6SkDraw8drawPathERK6SkPathRK7SkPaintPK8SkMatrixb
    fun:_ZN14SkBitmapDevice8drawPathERK6SkDrawRK6SkPathRK7SkPaintPK8SkMatrixb
 }
 {
-   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
-   fun:_ZN8chromeos24HostResolverImplChromeOS25CreateHostResolverForTestE13scoped_refptrIN4base16MessageLoopProxyEEPNS_19NetworkStateHandlerE
-   fun:_ZN28HostResolverImplChromeOSTest22InitializeHostResolverEv
-}
-{
    bug_394558
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN32ProfileSyncComponentsFactoryMockC1Ev
 }
 {
    bug_394624
    Memcheck:Leak
    ...
    fun:_ZN3net24URLRequestJobFactoryImpl18SetProtocolHandlerERKSsPNS_20URLRequestJobFactory15ProtocolHandlerE
@@ skipping 572 matching lines @@
    fun:_ZN4base19SequencedWorkerPool5Inner10ThreadLoopEPNS0_6WorkerE
    fun:_ZN4base19SequencedWorkerPool6Worker3RunEv
    fun:_ZN4base12SimpleThread10ThreadMainEv
    fun:_ZN4base12_GLOBAL__N_110ThreadFuncEPv
 }
 {
    bug_455732
    Memcheck:Leak
    fun:_Znw*
    ...
-   fun:_ZN4mojo7BindingINS_15ServiceProviderEE4BindENS_16ScopedHandleBaseINS_17MessagePipeHandleEEEPK15MojoAsyncWaiter
-   fun:_ZN4mojo7BindingINS_15ServiceProviderEE4BindENS_16InterfaceRequestIS1_EEPK15MojoAsyncWaiter
-   fun:_ZN7content19ServiceRegistryImpl4BindEN4mojo16InterfaceRequestINS1_15ServiceProviderEEE
    fun:_ZN7content12_GLOBAL__N_120ApplicationSetupImpl24ExchangeServiceProvidersEN4mojo16InterfaceRequestINS2_15ServiceProviderEEENS2_12InterfacePtrIS4_EE
    fun:_ZN7content20ApplicationSetupStub6AcceptEPN4mojo7MessageE
    fun:_ZN4mojo8internal6Router21HandleIncomingMessageEPNS_7MessageE
    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
 }
-
+{
+   bug_476940
+   Memcheck:Leak
+   fun:malloc
+   fun:_ZN3WTF9BitVector13OutOfLineBits6createEm
+   fun:_ZN3WTF9BitVector15resizeOutOfLineEm
+   fun:_ZN3WTF9BitVector10ensureSizeEm
+   fun:_ZN3WTF9BitVectorC2Em
+   fun:_ZN5blink10UseCounter9CountBitsC2Ev
+   fun:_ZN5blink10UseCounterC1Ev
+   fun:_ZN5blink4PageC1ERNS0_11PageClientsE
+}