Remove the ConnCountImpact FieldTrial code.

net/http/http_network_transaction.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/http/http_network_transaction.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 1020 matching lines @@
       base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
       100);
 
   bool reused_socket = stream_->IsConnectionReused();
   if (!reused_socket) {
     UMA_HISTOGRAM_CUSTOM_TIMES(
         "Net.Transaction_Connected_New_b",
         total_duration,
         base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
         100);
-
-  static const bool use_conn_impact_histogram =
-      base::FieldTrialList::TrialExists("ConnCountImpact");
-  if (use_conn_impact_histogram) {
-    UMA_HISTOGRAM_CUSTOM_TIMES(
-        base::FieldTrial::MakeName("Net.Transaction_Connected_New_b",
-            "ConnCountImpact"),
-        total_duration,
-        base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
-        100);
-    }
   }
 
   static const bool use_spdy_histogram =
       base::FieldTrialList::TrialExists("SpdyImpact");
   if (use_spdy_histogram && response_.was_npn_negotiated) {
     UMA_HISTOGRAM_CUSTOM_TIMES(
       base::FieldTrial::MakeName("Net.Transaction_Connected",
                                  "SpdyImpact"),
         total_duration, base::TimeDelta::FromMilliseconds(1),
         base::TimeDelta::FromMinutes(10), 100);
@@ skipping 387 matching lines @@
       description = base::StringPrintf("Unknown state 0x%08X (%u)", state,
                                        state);
       break;
   }
   return description;
 }
 
 #undef STATE_CASE
 
 }  // namespace net