Update existing suppression given code changes to IPC message dispatch.

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 # running overnight and removing outdated bugs/suppressions.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 3448 matching lines @@
    fun:_ZN13NPObjectProxy10NPAllocateEP4_NPPP7NPClass
    fun:_NPN_CreateObject
    fun:_ZN6WebKit11WebBindings12createObjectEP4_NPPP7NPClass
    fun:_ZN13NPObjectProxy6CreateEP17PluginChannelBaseiiRK4GURL
 }
 {
    Bug_69934_b
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN3IPC11SyncMessage13GenerateReplyEPKNS_7MessageE
-   fun:_ZN3IPC16MessageWithReplyI6Tuple1I21PluginMsg_Init_ParamsES1_IRbEE18DispatchDelayReplyIN13PluginChannel13MessageFilterEMS9_FvRKS2_PNS_7MessageEEEEbPKSC_PT_T0_
+   fun:_ZN3IPC17SyncMessageSchemaI6Tuple1I21PluginMsg_Init_ParamsES1_IRbEE32DispatchDelayReplyWithSendParamsIN13PluginChannel13MessageFilterEMS9_FvRKS2_PNS_7MessageEEEEbbRKS3_PKSC_PT_T0_
+   fun:_ZN14PluginMsg_Init18DispatchDelayReplyIN13PluginChannel13MessageFilterEMS2_FvRK21PluginMsg_Init_ParamsPN3IPC7MessageEEEEbPKS7_PT_T0_
    fun:_ZN13PluginChannel13MessageFilter17OnMessageReceivedERKN3IPC7MessageE
 }
 {
    Bug_70062
    Memcheck:Leak
    fun:calloc
    fun:PR_Calloc
    fun:PR_NewLock
    ...
    fun:InitSessionCacheLocks
@@ skipping 1911 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
 }