storage: Use stl utilities from the base namespace

storage/browser/fileapi/external_mount_points.cc

Index: storage/browser/fileapi/external_mount_points.cc
diff --git a/storage/browser/fileapi/external_mount_points.cc b/storage/browser/fileapi/external_mount_points.cc
index f9ffdbdbb99e6e45b6308d37333905deead29bab..927bca4c2a8ec2dd53946e856d485d6225f12852 100644
--- a/storage/browser/fileapi/external_mount_points.cc
+++ b/storage/browser/fileapi/external_mount_points.cc
@@ -253,15 +253,15 @@ void ExternalMountPoints::RevokeAllFileSystems() {
     instance_map_.clear();
     path_to_name_map_.clear();
   }
-  STLDeleteContainerPairSecondPointers(instance_map_copy.begin(),
-                                       instance_map_copy.end());
+  base::STLDeleteContainerPairSecondPointers(instance_map_copy.begin(),
+                                             instance_map_copy.end());
 }
 
 ExternalMountPoints::ExternalMountPoints() {}
 
 ExternalMountPoints::~ExternalMountPoints() {
-  STLDeleteContainerPairSecondPointers(instance_map_.begin(),
-                                       instance_map_.end());
+  base::STLDeleteContainerPairSecondPointers(instance_map_.begin(),
+                                             instance_map_.end());
 }
 
 FileSystemURL ExternalMountPoints::CrackFileSystemURL(