Extend suppressions for existing Valgrind reports

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 # running overnight and removing outdated bugs/suppressions.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 2133 matching lines @@
 }
 {
    bug_239141
    Memcheck:Leak
    fun:malloc
    ...
    fun:_ZN3WTF9BitVector13OutOfLineBits6createEm
    fun:_ZN3WTF9BitVector15resizeOutOfLineEm
    fun:_ZN3WTF9BitVector10ensureSizeEm
    fun:_ZN3WTF9BitVectorC*
+   ...
    fun:_ZN5blink10UseCounter17recordMeasurementENS0_7FeatureE
 }
 {
    bug_242672
    Memcheck:Leak
    fun:malloc
    ...
    fun:_ZN3WTF9BitVector13OutOfLineBits6createEm
    fun:_ZN3WTF9BitVector15resizeOutOfLineEm
    fun:_ZN3WTF9BitVector10ensureSizeEm
@@ skipping 1179 matching lines @@
    ...
    fun:_ZN16sync_file_system13drive_backend14SyncEngineTest5SetUpEv
 }
 {
    bug_422485
    Memcheck:Overlap
    fun:memcpy@@GLIBC_2.14
    fun:_ZNK8SkBitmap12copyPixelsToEPvmmb
    fun:_ZN5blink19ImageFrameGenerator14decodeAndScaleERK11SkImageInfomPvm
    fun:_ZN5blink22DecodingImageGenerator11onGetPixelsERK11SkImageInfoPvmPjPi
-   fun:_ZN16SkImageGenerator9getPixelsERK11SkImageInfoPvmPjPi
 }
 {
    bug_424056a
    Memcheck:Leak
    fun:malloc
    fun:_ZN3WTF13CStringBuffer19createUninitializedEm
    fun:_ZN3WTF7CString16newUninitializedEmRPc
    fun:_ZN3WTF15TextCodecLatin112encodeCommonIhEENS_7CStringEPKT_mNS_19UnencodableHandlingE
    fun:_ZN3WTF15TextCodecLatin16encodeEPKhmNS_19UnencodableHandlingE
 }
@@ skipping 257 matching lines @@
    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
 }
 {
    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
 }