Added the list of active field groups to NetLog dump

net/base/net_log_logger.cc

Index: net/base/net_log_logger.cc
diff --git a/net/base/net_log_logger.cc b/net/base/net_log_logger.cc
index 76b5b32224fe31d3004877180ab091239f66cea5..834be16f6c0bafa5f8f57181303e186bd1af3471 100644
--- a/net/base/net_log_logger.cc
+++ b/net/base/net_log_logger.cc
@@ -9,6 +9,7 @@
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/metrics/field_trial.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "net/base/address_family.h"
@@ -104,7 +105,6 @@ void NetLogLogger::OnAddEntry(const net::NetLog::Entry& entry) {
 
 base::DictionaryValue* NetLogLogger::GetConstants() {
   base::DictionaryValue* constants_dict = new base::DictionaryValue();
-

[xunjieli, 2014/10/23 19:56:25]

I will revert this edit in the next patch.

   // Version of the file format.
   constants_dict->SetInteger("logFormatVersion", kLogFormatVersion);
 
@@ -258,6 +258,18 @@ base::DictionaryValue* NetLogLogger::GetConstants() {
   // Provide a default empty value for compatibility.
   constants_dict->Set("clientInfo", new base::DictionaryValue());
 
+  // Add a list of active field experiments.
+  {
+    base::FieldTrial::ActiveGroups active_groups;
+    base::FieldTrialList::GetActiveFieldTrialGroups(&active_groups);
+    base::ListValue* field_trial_groups = new base::ListValue();
+    for (size_t i = 0; i < active_groups.size(); i++) {
+      field_trial_groups->AppendString(active_groups[i].group_name + ":" +
+                                       active_groups[i].trial_name);
+    }
+    constants_dict->Set("activeFieldTrialGroups", field_trial_groups);
+  }
+
   return constants_dict;
 }