Mark the leak of bug 77990 as intentional and adjust the suppression

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 # running overnight and removing outdated bugs/suppressions.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 3206 matching lines @@
 }
 {
    bug_76354
    Memcheck:Leak
    ...
    fun:_ZN24ViewHostMsg_ResolveProxyC1ERK4GURLPbPSs
    fun:_ZN25ResolveProxyMsgHelperTest13GenerateReplyEv
    fun:*ResolveProxyMsgHelperTest_*_Test8TestBodyEv
 }
 {
-   bug_77990
+   # Intentionally leaking NSS to prevent shutdown crashes

[cbentzel, 2011/12/07 13:14:52]

This should move into either section 1 or section 2 above. See the comments at
the top of the file.

+   bug_77990 (Intentional)
    Memcheck:Leak
    fun:calloc
    ...
    fun:error_get_my_stack
    fun:nss_ClearErrorStack
    fun:NSSArena_Destroy
-   fun:nssList_Destroy
-   fun:nssCertificateStore_RemoveCertLOCKED
-   fun:nssCertificate_Destroy
-   ...
-   fun:ssl_DestroySID
-   fun:ssl_FreeLockedSID
-   fun:UncacheSID
-   fun:SSL_ClearSessionCache
 }
 {
    bug_78201
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN18BrowserProcessImpl28CreateResourceDispatcherHostEv
    fun:_ZN18BrowserProcessImpl24resource_dispatcher_hostEv
    fun:_ZN16ExtensionService4InitEv
    fun:_ZN11ProfileImpl14InitExtensionsE*
 }
@@ skipping 2189 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }