Widen NSSInitSingleton 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 # running overnight and removing outdated bugs/suppressions.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 6234 matching lines @@
    bug_321976
    Memcheck:Leak
    ...
    fun:nssList_Create
    fun:nssTrustDomain_UpdateCachedTokenCerts
    fun:nssSlot_Refresh
    fun:nssSlot_IsTokenPresent
    fun:pk11_IsPresentCertLoad
    fun:SECMOD_OpenNewSlot
    fun:_ZN6crypto12_GLOBAL__N_116NSSInitSingleton10OpenUserDBERKN4base8FilePathEPKc
-   fun:_ZN6crypto12_GLOBAL__N_116NSSInitSingleton26OpenPersistentNSSDBForPathERKN4base8FilePathE
-   fun:_ZN6crypto12_GLOBAL__N_116NSSInitSingleton28InitializeNSSForChromeOSUserERKSsS3_bRKN4base8FilePathE
-   fun:_ZN6crypto28InitializeNSSForChromeOSUserERKSsS1_bRKN4base8FilePathE
 }
 {
    bug_327672
    Memcheck:Uninitialized
    fun:_ZNK7WebCore18StyleSheetContents11isCacheableEv
    fun:_ZN7WebCore9LinkStyle16setCSSStyleSheetERKN3WTF6StringERKNS_4KURLES4_PKNS_21CSSStyleSheetResourceE
    fun:_ZN7WebCore21CSSStyleSheetResource11checkNotifyEv
    ...
    fun:_ZN11webkit_glue16WebURLLoaderImpl7Context18OnCompletedRequestEibRKSsRKN4base9TimeTicksE
 }
@@ skipping 96 matching lines @@
    fun:_ZN15google_breakpad16ExceptionHandler12HandleSignalEiP7siginfoPv
    fun:_ZN15google_breakpad16ExceptionHandler13SignalHandlerEiP7siginfoPv
 }
 {
    bug_333992
    Memcheck:Leak
    fun:_Znw*
    fun:_ZN7content12_GLOBAL__N_123CreateWebFrameTestProxyEPNS_14RenderViewImplEi
    fun:_ZN7content15RenderFrameImpl6CreateEPNS_14RenderViewImplEi
 }