Update from https://crrev.com/315085

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 # running overnight and removing outdated bugs/suppressions.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 3383 matching lines @@
    fun:_Znw*
    fun:_ZN2ui9Clipboard6CreateEv
    fun:_ZN2ui9Clipboard19GetForCurrentThreadEv
    fun:_ZN2ui21ScopedClipboardWriterD1Ev
    fun:_ZN8remoting13ClipboardAura4Core20InjectClipboardEventERKNS_8protocol14ClipboardEventE
 }
 {
    bug_431213
    Memcheck:Leak
    fun:_Znw*
-   fun:_ZN3gin22CreateFunctionTemplateIFSsPN4mojo2js13HandleWrapperEEEEN2v85LocalINS6_16FunctionTemplateEEEPNS6_7IsolateEN4base8CallbackIT_EEi
-   fun:_ZN3gin12_GLOBAL__N_114CallbackTraitsIMN4mojo2js13HandleWrapperEFSsvEvE14CreateTemplateEPN2v87IsolateES6_
-   fun:_ZN3gin21ObjectTemplateBuilder9SetMethodIMN4mojo2js13HandleWrapperEFSsvEEERS0_RKN4base16BasicStringPieceISsEERKT_
-   fun:_ZN4mojo2js13HandleWrapper24GetObjectTemplateBuilderEPN2v87IsolateE
+   fun:_ZN3gin22CreateFunctionTemplateIF*LocalINS6_16FunctionTemplateEEEPNS6_7IsolateEN4base8CallbackIT_EEi
+   fun:_ZN3gin12_GLOBAL__N_114CallbackTraitsIMN*CreateTemplateEPN2v87IsolateES6_
+   fun:_ZN3gin21ObjectTemplateBuilder9SetMethodIMN*0_RKN4base16BasicStringPieceISsEERKT_
+   fun:_ZN*24GetObjectTemplateBuilderEPN2v87IsolateE
 }
 {
    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
@@ skipping 171 matching lines @@
    fun:_ZNSt8_Rb_treeIiSt4pairIKi10linked_ptrIN4base19SequencedWorkerPool6WorkerEEESt10_Select1stIS7_ESt4lessIiESaIS7_EE11_M_get_nodeEv
    fun:_ZNSt8_Rb_treeIiSt4pairIKi10linked_ptrIN4base19SequencedWorkerPool6WorkerEEESt10_Select1stIS7_ESt4lessIiESaIS7_EE14_M_create_nodeIJS0_IiS6_EEEEPSt13_Rb_tree_nodeIS7_EDpOT_
    fun:_ZNSt8_Rb_treeIiSt4pairIKi10linked_ptrIN4base19SequencedWorkerPool6WorkerEEESt10_Select1stIS7_ESt4lessIiESaIS7_EE10_M_insert_IS0_IiS6_EEESt17_Rb_tree_iteratorIS7_EPKSt18_Rb_tree_node_baseSK_OT_
    fun:_ZNSt8_Rb_treeIiSt4pairIKi10linked_ptrIN4base19SequencedWorkerPool6WorkerEEESt10_Select1stIS7_ESt4lessIiESaIS7_EE16_M_insert_uniqueIS0_IiS6_EEES0_ISt17_Rb_tree_iteratorIS7_EbEOT_
    fun:_ZNSt3mapIi10linked_ptrIN4base19SequencedWorkerPool6WorkerEESt4lessIiESaISt4pairIKiS4_EEE6insertIS7_IiS4_EvEES7_ISt17_Rb_tree_iteratorIS9_EbEOT_
    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
+}