Heapchecker: Update suppression for leak in buzz::XmppClient.

tools/heapcheck/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 # running overnight and removing outdated bugs/suppressions.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 1389 matching lines @@
 }
 {
    bug_80654
    Heapcheck:Leak
    fun:__gnu_cxx::new_allocator::allocate
    fun:std::_Vector_base::_M_allocate
    fun:std::vector::_M_insert_aux
    fun:std::vector::push_back
    fun:ObserverListBase::AddObserver
    fun:net::SSLConfigService::AddObserver
-   fun:net::SSLClientSocketPool::SSLClientSocketPool
-   fun:net::ClientSocketPoolManager::ClientSocketPoolManager
-   fun:net::HttpNetworkSession::HttpNetworkSession
-   fun:notifier::ProxyResolvingClientSocket::ProxyResolvingClientSocket
+   fun:SSLClientSocketPool
+   fun:ClientSocketPoolManager
+   fun:HttpNetworkSession
+   fun:ProxyResolvingClientSocket
    fun:notifier::XmppClientSocketFactory::CreateTransportClientSocket
    fun:notifier::ChromeAsyncSocket::Connect
    fun:buzz::XmppClient::ProcessStartXmppLogin
    fun:buzz::XmppClient::Process
    fun:talk_base::Task::Step
    fun:talk_base::TaskRunner::InternalRunTasks
    fun:talk_base::TaskRunner::RunTasks
    fun:notifier::TaskPump::CheckAndRunTasks
    fun:void DispatchToMethod
 }
@@ skipping 288 matching lines @@
    fun:BrowserAccessibilityManagerTest_TestCreateEmptyDocument_Test::TestBody
 }
 {
    bug_91845_c
    Heapcheck:Leak
    ...
    fun:BrowserAccessibilityManager::Create
    fun:BrowserAccessibilityManager::CreateEmptyDocument
    fun:BrowserAccessibilityManagerTest_TestCreateEmptyDocument_Test::TestBody
 }