[net] Add WifiPhyMode to SystemProfile

net/base/host_resolver_impl.cc

Index: net/base/host_resolver_impl.cc
diff --git a/net/base/host_resolver_impl.cc b/net/base/host_resolver_impl.cc
index ba59569de7f90d6066ceba20ccc8b28b7b34178d..db76b25bf1209432848ebdcde86cf5acebc106b1 100644
--- a/net/base/host_resolver_impl.cc
+++ b/net/base/host_resolver_impl.cc
@@ -1982,6 +1982,10 @@ void HostResolverImpl::CacheResult(const Key& key,
                                    base::TimeDelta ttl) {
   if (cache_.get())
     cache_->Set(key, entry, base::TimeTicks::Now(), ttl);
+  base::TimeTicks then = base::TimeTicks::Now();

[rvargas (doing something else), 2013/02/12 02:42:33]

You don't mean to check this in, right?

[szym, 2013/02/12 04:53:43]

No, sorry, this is just my shamefully dirty way of testing that it works. (My
test machine is a ganky old WinXP laptop, so it's easy to just copy
mini_installer.)

+  WifiPhyMode phy_mode = GetWifiPhyMode();
+  UMA_HISTOGRAM_TIMES("WifiPHY.Time", base::TimeTicks::Now() - then);
+  UMA_HISTOGRAM_COUNTS("WifiPHY.Mode", phy_mode);
 }
 
 void HostResolverImpl::RemoveJob(Job* job) {