components: Use stl utilities from the base namespace

components/syncable_prefs/pref_model_associator.cc

Index: components/syncable_prefs/pref_model_associator.cc
diff --git a/components/syncable_prefs/pref_model_associator.cc b/components/syncable_prefs/pref_model_associator.cc
index ef63b1c4cb503b5d6adbe459fc48fa4d597e989f..aae6ab77d63b0225c5e4c18912a7c4089e5d4a1a 100644
--- a/components/syncable_prefs/pref_model_associator.cc
+++ b/components/syncable_prefs/pref_model_associator.cc
@@ -70,8 +70,8 @@ PrefModelAssociator::~PrefModelAssociator() {
   DCHECK(CalledOnValidThread());
   pref_service_ = NULL;
 
-  STLDeleteContainerPairSecondPointers(synced_pref_observers_.begin(),
-                                       synced_pref_observers_.end());
+  base::STLDeleteContainerPairSecondPointers(synced_pref_observers_.begin(),
+                                             synced_pref_observers_.end());
   synced_pref_observers_.clear();
 }