Rename base::FieldTrialList::RegistrationList --> RegistrationMap.

base/metrics/field_trial.cc

Index: base/metrics/field_trial.cc
diff --git a/base/metrics/field_trial.cc b/base/metrics/field_trial.cc
index b99f3148f96d353b4ea24b5ef12d51f18eb71aa7..f718ab0371fa3b05cc6be4e0a0ab254e820c1e71 100644
--- a/base/metrics/field_trial.cc
+++ b/base/metrics/field_trial.cc
@@ -252,7 +252,7 @@ FieldTrialList::FieldTrialList(
 FieldTrialList::~FieldTrialList() {
   AutoLock auto_lock(lock_);
   while (!registered_.empty()) {
-    RegistrationList::iterator it = registered_.begin();
+    RegistrationMap::iterator it = registered_.begin();
     it->second->Release();
     registered_.erase(it->first);
   }
@@ -390,7 +390,7 @@ void FieldTrialList::GetActiveFieldTrialGroups(
     return;
   AutoLock auto_lock(global_->lock_);
 
-  for (RegistrationList::iterator it = global_->registered_.begin();
+  for (RegistrationMap::iterator it = global_->registered_.begin();
        it != global_->registered_.end(); ++it) {
     FieldTrial::ActiveGroup active_group;
     if (it->second->GetActiveGroup(&active_group))
@@ -513,7 +513,7 @@ const FieldTrial::EntropyProvider*
 }
 
 FieldTrial* FieldTrialList::PreLockedFind(const std::string& name) {
-  RegistrationList::iterator it = registered_.find(name);
+  RegistrationMap::iterator it = registered_.find(name);
   if (registered_.end() == it)
     return NULL;
   return it->second;