Removed using statements from common.h

These statements pulled a bunch of symbols from the std namespace into
the global namespace. This commit removes all of them except for
std::string, which is a bit trickier to remove.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/google/protobuf/stubs/hash.h b/src/google/protobuf/stubs/hash.h
index 218cd948..daf8ec57 100644
--- a/src/google/protobuf/stubs/hash.h
+++ b/src/google/protobuf/stubs/hash.h
@@ -408,8 +408,8 @@ struct hash<string> {
 };
 
 template <typename First, typename Second>
-struct hash<pair<First, Second> > {
-  inline size_t operator()(const pair<First, Second>& key) const {
+struct hash<std::pair<First, Second> > {
+  inline size_t operator()(const std::pair<First, Second>& key) const {
     size_t first_hash = hash<First>()(key.first);
     size_t second_hash = hash<Second>()(key.second);
 
@@ -420,8 +420,8 @@ struct hash<pair<First, Second> > {
 
   static const size_t bucket_size = 4;
   static const size_t min_buckets = 8;
-  inline bool operator()(const pair<First, Second>& a,
-                           const pair<First, Second>& b) const {
+  inline bool operator()(const std::pair<First, Second>& a,
+                           const std::pair<First, Second>& b) const {
     return a < b;
   }
 };