Supporting command line argument to force field trials

chrome/browser/net/http_pipelining_compatibility_client.cc

Index: chrome/browser/net/http_pipelining_compatibility_client.cc
diff --git a/chrome/browser/net/http_pipelining_compatibility_client.cc b/chrome/browser/net/http_pipelining_compatibility_client.cc
index 92aa1d24424eb1a77e37e441ce818a6656d8f702..38b0c236ac2a093a05d1e884ce5734247304b7b0 100644
--- a/chrome/browser/net/http_pipelining_compatibility_client.cc
+++ b/chrome/browser/net/http_pipelining_compatibility_client.cc
@@ -306,8 +306,8 @@ void CollectPipeliningCapabilityStatsOnIOThread(
     return;
   }
   // After April 1, 2012, the trial will disable itself.
-  trial = new base::FieldTrial(kTrialName, kDivisor,
-                               "disable_test", 2012, 4, 1);
+  trial = base::FieldTrialList::GetFieldTrialInstance(
+      kTrialName, kDivisor, "disable_test", NULL, 2012, 4, 1);
 
   chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
   if (channel == chrome::VersionInfo::CHANNEL_CANARY) {