[CleanUp] Use base::STLSetDifference in place of std::set_difference

net/base/mime_util.cc

Index: net/base/mime_util.cc
diff --git a/net/base/mime_util.cc b/net/base/mime_util.cc
index da3a4c9aee8d40a019c67069086b533d8d9da93a..bc074ba5b928b304aefc6f4de78c10793ed1ff77 100644
--- a/net/base/mime_util.cc
+++ b/net/base/mime_util.cc
@@ -10,6 +10,7 @@
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
+#include "base/stl_util.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ -535,10 +536,9 @@ bool MatchesMimeTypeParameters(const std::string& mime_type_pattern,
 
     sort(pattern_parameters.begin(), pattern_parameters.end());
     sort(test_parameters.begin(), test_parameters.end());
-    std::vector<std::string> difference;
-    std::set_difference(pattern_parameters.begin(), pattern_parameters.end(),
-                        test_parameters.begin(), test_parameters.end(),
-                        std::inserter(difference, difference.begin()));
+    std::vector<std::string> difference =
+        base::STLSetDifference<std::vector<std::string> >(pattern_parameters,
+                                                          test_parameters);
 
     return difference.size() == 0;
   }