Experiment for number of persistent connections to server...

chrome/renderer/render_view.cc

Index: chrome/renderer/render_view.cc
===================================================================
--- chrome/renderer/render_view.cc	(revision 49024)
+++ chrome/renderer/render_view.cc	(working copy)
@@ -4571,6 +4571,46 @@
     }
   }
 
+  static bool use_conn_impact_histogram(
+      FieldTrialList::Find("ConnCountImpact") &&
+      !FieldTrialList::Find("ConnCountImpact")->group_name().empty());
+  if (use_conn_impact_histogram) {
+    UMA_HISTOGRAM_ENUMERATION(
+        FieldTrial::MakeName("Renderer4.Abandoned", "ConnCountImpact"),
+        abandoned_page ? 1 : 0, 2);
+    UMA_HISTOGRAM_ENUMERATION(
+        FieldTrial::MakeName("Renderer4.LoadType", "ConnCountImpact"),
+        load_type, NavigationState::kLoadTypeMax);
+    switch (load_type) {
+      case NavigationState::NORMAL_LOAD:
+        UMA_HISTOGRAM_CUSTOM_TIMES(FieldTrial::MakeName(
+            "Renderer4.BeginToFinish_NormalLoad", "ConnCountImpact"),
+            begin_to_finish, kBeginToFinishMin, kBeginToFinishMax,
+            kBeginToFinishBucketCount);
+        break;
+      case NavigationState::LINK_LOAD_NORMAL:
+        UMA_HISTOGRAM_CUSTOM_TIMES(FieldTrial::MakeName(
+            "Renderer4.BeginToFinish_LinkLoadNormal", "ConnCountImpact"),
+            begin_to_finish, kBeginToFinishMin, kBeginToFinishMax,
+            kBeginToFinishBucketCount);
+        break;
+      case NavigationState::LINK_LOAD_RELOAD:
+        UMA_HISTOGRAM_CUSTOM_TIMES(FieldTrial::MakeName(
+            "Renderer4.BeginToFinish_LinkLoadReload", "ConnCountImpact"),
+            begin_to_finish, kBeginToFinishMin, kBeginToFinishMax,
+            kBeginToFinishBucketCount);
+        break;
+      case NavigationState::LINK_LOAD_CACHE_STALE_OK:
+        UMA_HISTOGRAM_CUSTOM_TIMES(FieldTrial::MakeName(
+            "Renderer4.BeginToFinish_LinkLoadStaleOk", "ConnCountImpact"),
+            begin_to_finish, kBeginToFinishMin, kBeginToFinishMax,
+            kBeginToFinishBucketCount);
+        break;
+      default:
+        break;
+    }
+  }
+
   static bool use_sdch_histogram(FieldTrialList::Find("GlobalSdch") &&
       !FieldTrialList::Find("GlobalSdch")->group_name().empty());
   if (use_sdch_histogram) {