Land http://codereview.chromium.org/6869009 for the third time.

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 # running overnight and removing outdated bugs/suppressions.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 130 matching lines @@
 {
    Intentional leak of *Histograms to avoid shutdown races
    Heapcheck:Leak
    ...
    fun:base::*Histogram::FactoryGet
 }
 {
    Intentional leak of stats histogram to avoid shutdown races
    Heapcheck:Leak
    ...
-   fun:disk_cache::StatsHistogram::StatsHistogramFactoryGet
+   fun:disk_cache::StatsHistogram::FactoryGet
 }
 {
    String name pushed into deliberately leaked histograms
    Heapcheck:Leak
    ...
    fun:*basic_string*
    fun:base:*:HistogramTest_*_Test::TestBody
 }
 {
    String name pushed into deliberately leaked ScoketPool histigram
@@ skipping 1441 matching lines @@
    fun:net::ConnectJob::Connect
    fun:net::internal::ClientSocketPoolBaseHelper::RequestSocketInternal
    fun:net::internal::ClientSocketPoolBaseHelper::RequestSocket
    fun:net::ClientSocketPoolBase::RequestSocket
    fun:net::TransportClientSocketPool::RequestSocket
    fun:net::ClientSocketHandle::Init
    fun:net::::InitSocketPoolHelper
    fun:net::ClientSocketPoolManager::InitSocketHandleForRawConnect
    fun:notifier::ProxyResolvingClientSocket::ProcessProxyResolveDone
 }