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

third_party/protobuf/src/google/protobuf/map_field_test.cc

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
@@ skipping 60 matching lines @@
   RepeatedPtrField<Message>* InternalRepeatedField() {
     return repeated_field_;
   }
   bool IsMapClean() { return state_ != 0; }
   bool IsRepeatedClean() { return state_ != 1; }
   void SetMapDirty() { state_ = 0; }
   void SetRepeatedDirty() { state_ = 1; }
   bool ContainsMapKey(const MapKey& map_key) const {
     return false;
   }
-  bool InsertMapValue(const MapKey& map_key, MapValueRef* val) {
+  bool InsertOrLookupMapValue(const MapKey& map_key, MapValueRef* val) {
     return false;
   }
   bool DeleteMapValue(const MapKey& map_key) {
     return false;
   }
   bool EqualIterator(const MapIterator& a, const MapIterator& b) const {
     return false;
   }
   int size() const { return 0; }
   void MapBegin(MapIterator* map_iter) const {}
@@ skipping 393 matching lines @@
     Expect(map_field_.get(), REPEATED_DIRTY, 1, 1, false);
   } else {
     Expect(map_field_.get(), REPEATED_DIRTY, 0, 1, false);
   }
 }
 
 
 }  // namespace internal
 }  // namespace protobuf
 }  // namespace google