Add chrome-side code for autoreload experiment.

chrome/renderer/net/net_error_helper.cc

Index: chrome/renderer/net/net_error_helper.cc
diff --git a/chrome/renderer/net/net_error_helper.cc b/chrome/renderer/net/net_error_helper.cc
index 21aa44f269aa817f18ed9e3940e1144f667dedf0..3d839a1c76f3c063ee5a50441d7932e9ed537dce 100644
--- a/chrome/renderer/net/net_error_helper.cc
+++ b/chrome/renderer/net/net_error_helper.cc
@@ -9,6 +9,7 @@
 #include "base/command_line.h"
 #include "base/i18n/rtl.h"
 #include "base/json/json_writer.h"
+#include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
@@ -86,8 +87,13 @@ NetErrorHelper::NetErrorHelper(RenderFrame* render_view)
       core_(this) {
   RenderThread::Get()->AddObserver(this);
   CommandLine* command_line = CommandLine::ForCurrentProcess();
-  bool auto_reload_enabled =
-      command_line->HasSwitch(switches::kEnableOfflineAutoReload);
+  std::string field_trial_group =
+      base::FieldTrialList::FindFullName("AutoReloadExperiment");
+  bool auto_reload_enabled = false;

[mmenke, 2014/03/28 14:54:02]

nit:  Do we really need this bool?

+
+  if (field_trial_group == "Enabled" ||
+      command_line->HasSwitch(switches::kEnableOfflineAutoReload))

[mmenke, 2014/03/28 14:54:02]

nit:  Use braces {} when if statement+body takes up more than 2 lines.

+    auto_reload_enabled = true;
   core_.set_auto_reload_enabled(auto_reload_enabled);
 }