Add/update suppression for leak in DomStorage

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 # running overnight and removing outdated bugs/suppressions.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 6134 matching lines @@
    fun:_ZN7WebCore11RenderLayer18paintLayerContentsEPNS_15GraphicsContextERKNS0_17LayerPaintingInfoEj
    fun:_ZN7WebCore11RenderLayer31paintLayerContentsAndReflectionEPNS_15GraphicsContextERKNS0_17LayerPaintingInfoEj
    fun:_ZN7WebCore11RenderLayer10paintLayerEPNS_15GraphicsContextERKNS0_17LayerPaintingInfoEj
 }
 {
    bug_166470
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base4BindIMN11dom_storage17DomStorageContextEFvRK4GURLE13scoped_refptrIS2_ES3_EENS_8CallbackINS_8internal9BindStateINSB_13FunctorTraitsIT_E12RunnableTypeENSF_7RunTypeEFvNSB_19CallbackParamTraitsIT0_E11StorageTypeENSI_IT1_E11StorageTypeEEE14UnboundRunTypeEEESE_RKSJ_RKSM_
    fun:_ZN7content21DOMStorageContextImpl18DeleteLocalStorageERK4GURL
-   fun:_ZN7content20StoragePartitionImpl23AsyncClearDataForOriginERK4GURLPN3net23URLRequestContextGetterE
+   fun:_ZN7content20StoragePartitionImpl23AsyncClearDataForOriginEjRK4GURLPN3net23URLRequestContextGetterE
    fun:_ZN10extensions11DataDeleter13StartDeletingEP7ProfileRKSsRK4GURL
    fun:_ZN16ExtensionService18UninstallExtensionESsbPSbItN4base20string16_char_traitsESaItEE
 }
 {
    bug_166470b
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN9__gnu_cxx13new_allocator*FilePath*allocate*
    fun:_ZNSt12_Vector_base*FilePath*_M_allocate*
    fun:_ZNSt6vector*FilePath*_M_insert_aux*
@@ skipping 541 matching lines @@
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base54WeakPtrTest_NonOwnerThreadCanCopyAndAssignWeakPtr_Test8TestBodyEv
 }
 {
    bug_179758_b
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN4base58WeakPtrTest_NonOwnerThreadCanCopyAndAssignWeakPtrBase_Test8TestBodyEv
 }
+{
+   bug_180381
+   Memcheck:Leak
+   fun:_Znw*
+   ...
+   fun:_ZN4base8FilePath31StripTrailingSeparatorsInternalEv
+   fun:_ZNK4base8FilePath7DirNameEv
+   fun:_ZN11dom_storage18DomStorageDatabase18GetJournalFilePathERKN4base8FilePathE
+   fun:_ZN11dom_storage27LocalStorageDatabaseAdapter11DeleteFilesEv
+   fun:_ZN11dom_storage14DomStorageArea12DeleteOriginEv
+   fun:_ZN11dom_storage19DomStorageNamespace24DeleteLocalStorageOriginERK4GURL
+   fun:_ZN11dom_storage17DomStorageContext18DeleteLocalStorageERK4GURL
+}