Remove the ConnCountImpact FieldTrial code.

chrome/renderer/page_load_histograms.cc

Index: chrome/renderer/page_load_histograms.cc
diff --git a/chrome/renderer/page_load_histograms.cc b/chrome/renderer/page_load_histograms.cc
index a2c511d510f080065f0c0401748c7c9bf284e26a..9b4dc86255eacb99220acfbb7fb96453dee5b873 100644
--- a/chrome/renderer/page_load_histograms.cc
+++ b/chrome/renderer/page_load_histograms.cc
@@ -459,42 +459,6 @@ void PageLoadHistograms::Dump(WebFrame* frame) {
     }
   }
 
-  // Histograms to determine if the number of connections has an
-  // impact on PLT.
-  // TODO(jar): Consider removing the per-link-type versions.  We
-  //   really only need LINK_LOAD_NORMAL and NORMAL_LOAD.
-  static const bool use_connection_impact_histogram =
-      base::FieldTrialList::TrialExists("ConnCountImpact");
-  if (use_connection_impact_histogram) {
-    UMA_HISTOGRAM_ENUMERATION(
-        base::FieldTrial::MakeName("PLT.Abandoned", "ConnCountImpact"),
-        abandoned_page ? 1 : 0, 2);
-    switch (load_type) {
-      case DocumentState::NORMAL_LOAD:
-        PLT_HISTOGRAM(base::FieldTrial::MakeName(
-            "PLT.BeginToFinish_NormalLoad", "ConnCountImpact"),
-            begin_to_finish_all_loads);
-        break;
-      case DocumentState::LINK_LOAD_NORMAL:
-        PLT_HISTOGRAM(base::FieldTrial::MakeName(
-            "PLT.BeginToFinish_LinkLoadNormal", "ConnCountImpact"),
-            begin_to_finish_all_loads);
-        break;
-      case DocumentState::LINK_LOAD_RELOAD:
-        PLT_HISTOGRAM(base::FieldTrial::MakeName(
-            "PLT.BeginToFinish_LinkLoadReload", "ConnCountImpact"),
-            begin_to_finish_all_loads);
-        break;
-      case DocumentState::LINK_LOAD_CACHE_STALE_OK:
-        PLT_HISTOGRAM(base::FieldTrial::MakeName(
-            "PLT.BeginToFinish_LinkLoadStaleOk", "ConnCountImpact"),
-            begin_to_finish_all_loads);
-        break;
-      default:
-        break;
-    }
-  }
-
   // Histograms to determine effect of idle socket timeout.
   static const bool use_idle_socket_timeout_histogram =
       base::FieldTrialList::TrialExists("IdleSktToImpact");