Use NSSRWLock instead of PRRWLock in sslSessionID. This avoids the bugs

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 # running overnight and removing outdated bugs/suppressions.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 3762 matching lines @@
 {
    bug_124156
    Memcheck:Leak
    fun:_Znw*
    ...
    fun:*WebKitPlatformSupport*20CreateResourceLoaderERKN11webkit_glue20ResourceLoaderBridge11RequestInfoE
    fun:_ZN11webkit_glue16WebURLLoaderImpl7Context5StartERKN5blink13WebURLRequestEPNS_20ResourceLoaderBridge16SyncLoadResponseEPNS_25WebKitPlatformSupportImplE
    fun:_ZN11webkit_glue16WebURLLoaderImpl18loadAsynchronouslyERKN5blink13WebURLRequestEPNS1_18WebURLLoaderClientE
 }
 {
-   bug_124445
-   Memcheck:Leak
-   fun:calloc
-   fun:PR_Calloc
-   ...
-   fun:_ZN3net18SSLClientSocketNSS4Core11DoHandshakeEv
-   ...
-   fun:_ZN8remoting8protocol21AuthenticatorTestBase14RunChannelAuthEb
-}
-{
    bug_124488
    Memcheck:Leak
    fun:malloc
    fun:strdup
    ...
    fun:_ZN34CopyTextureCHROMIUMResourceManager10InitializeEv
    fun:_ZN3gpu5gles216GLES2DecoderImpl10InitializeERK13scoped_refptrIN3gfx9GLSurfaceEERKS2_INS3_9GLContextEERKNS3_4SizeERKNS0_18DisallowedFeaturesEPKcRKSt6vectorIiSaIiEE
    fun:_ZN6webkit3gpu18GLInProcessContext10InitializeERKN3gfx4SizeEPS1_PKcPKiNS2_13GpuPreferenceE
    fun:_ZN6webkit3gpu18GLInProcessContext22CreateOffscreenContextEPS1_RKN3gfx4SizeES2_PKcPKiNS3_13GpuPreferenceE
    fun:_ZN6webkit3gpu46WebGraphicsContext3DInProcessCommandBufferImpl10InitializeEN5blink20WebGraphicsContext3D10AttributesEPS3_
@@ skipping 2610 matching lines @@
 }
 {
    bug_332335
    Memcheck:Param
    sendmsg(msg.msg_iov[0])
    fun:sys_sendmsg
    fun:_ZN8breakpad12_GLOBAL__N_122NonBrowserCrashHandlerEPKvmPv
    fun:_ZN15google_breakpad16ExceptionHandler12HandleSignalEiP7siginfoPv
    fun:_ZN15google_breakpad16ExceptionHandler13SignalHandlerEiP7siginfoPv
 }