Update third_party/protobuf to protobuf-v3.0.0-beta-3

third_party/protobuf/src/google/protobuf/map_field.h

Index: third_party/protobuf/src/google/protobuf/map_field.h
diff --git a/third_party/protobuf/src/google/protobuf/map_field.h b/third_party/protobuf/src/google/protobuf/map_field.h
index 9130166b8594035261eefb71f8f9c98ef4bbfdab..4b46f3aa027f3489e063066c9023d0ecce51e8fd 100644
--- a/third_party/protobuf/src/google/protobuf/map_field.h
+++ b/third_party/protobuf/src/google/protobuf/map_field.h
@@ -87,7 +87,8 @@ class LIBPROTOBUF_EXPORT MapFieldBase {
 
   // Pure virtual map APIs for Map Reflection.
   virtual bool ContainsMapKey(const MapKey& map_key) const = 0;
-  virtual bool InsertMapValue(const MapKey& map_key, MapValueRef* val) = 0;
+  virtual bool InsertOrLookupMapValue(
+      const MapKey& map_key, MapValueRef* val) = 0;
   virtual bool DeleteMapValue(const MapKey& map_key) = 0;
   virtual bool EqualIterator(const MapIterator& a,
                              const MapIterator& b) const = 0;
@@ -251,7 +252,7 @@ class MapField : public TypeDefinedMapFieldBase<Key, T>,
 
   // Implement MapFieldBase
   bool ContainsMapKey(const MapKey& map_key) const;
-  bool InsertMapValue(const MapKey& map_key, MapValueRef* val);
+  bool InsertOrLookupMapValue(const MapKey& map_key, MapValueRef* val);
   bool DeleteMapValue(const MapKey& map_key);
 
   // Accessors
@@ -302,7 +303,7 @@ class LIBPROTOBUF_EXPORT DynamicMapField: public TypeDefinedMapFieldBase<MapKey,
 
   // Implement MapFieldBase
   bool ContainsMapKey(const MapKey& map_key) const;
-  bool InsertMapValue(const MapKey& map_key, MapValueRef* val);
+  bool InsertOrLookupMapValue(const MapKey& map_key, MapValueRef* val);
   bool DeleteMapValue(const MapKey& map_key);
 
   const Map<MapKey, MapValueRef>& GetMap() const;