Update one memory leak suppression to account for the slightly modified method signature

tools/valgrind/memcheck/suppressions.txt

 # There are three 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 # running overnight and removing outdated bugs/suppressions.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 4742 matching lines @@
    ...
    fun:_ZN11ProfileImpl13OnPrefsLoadedEb
    ...
    fun:_ZN11ProfileImplC1ERK8FilePathPN7Profile8DelegateE
 }
 {
    bug_88863_a
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN3IPC11SyncMessage13GenerateReplyEPKNS_7MessageE
-   fun:_ZN3IPC16MessageWithReplyI6Tuple1IbES1_IRSt6vectorIN6webkit5npapi13WebPluginInfoESaIS6_EEEE8DispatchI19RenderMessageFilterSD_MSD_FvbPS8_EEEbPKNS_7MessageEPT_PT0_T1_
+   fun:_ZN3IPC16MessageWithReplyI6Tuple1IbES1_IRSt6vectorIN6webkit13WebPluginInfoESaIS5_EEEE8DispatchI19RenderMessageFilterSC_MSC_FvbPS7_EEEbPKNS_7MessageEPT_PT0_T1_
    fun:_ZN19RenderMessageFilter17OnMessageReceivedERKN3IPC7MessageEPb
 }
 {
    bug_88863_b
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN9__gnu_cxx13new_allocatorI13scoped_refptrIN3IPC12ChannelProxy13MessageFilterEEE8allocateEjPKv
    fun:_ZNSt12_Vector_baseI13scoped_refptrIN3IPC12ChannelProxy13MessageFilterEESaIS4_EE11_M_allocateEj
    fun:_ZNSt6vectorI13scoped_refptrIN3IPC12ChannelProxy13MessageFilterEESaIS4_EE13_M_insert_auxEN9__gnu_cxx17__normal_iteratorIPS4_S6_EERKS4_
 }
@@ skipping 526 matching lines @@
 }
 {
    bug_todo_getdelim2
    Memcheck:Leak
    fun:malloc
    fun:getdelim
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }