Update //third_party/protobuf to version 3.

third_party/protobuf/src/google/protobuf/arena_nc.cc

Index: third_party/protobuf/src/google/protobuf/arena_nc.cc
diff --git a/third_party/protobuf/src/google/protobuf/service.cc b/third_party/protobuf/src/google/protobuf/arena_nc.cc
similarity index 82%
copy from third_party/protobuf/src/google/protobuf/service.cc
copy to third_party/protobuf/src/google/protobuf/arena_nc.cc
index caf968ca5b4d46115c87a504b6a09d1358356884..f2f084274a4e892681cd7867901196e48e8c1301 100644
--- a/third_party/protobuf/src/google/protobuf/service.cc
+++ b/third_party/protobuf/src/google/protobuf/arena_nc.cc
@@ -1,6 +1,6 @@
 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
-// http://code.google.com/p/protobuf/
+// 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
@@ -28,19 +28,18 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Author: kenton@google.com (Kenton Varda)
-//  Based on original Protocol Buffers design by
-//  Sanjay Ghemawat, Jeff Dean, and others.
+// Negative compilation test for arena usage.
 
-#include <google/protobuf/service.h>
+#include <google/protobuf/arena.h>
+#include <google/protobuf/unittest.pb.h>
 
-namespace google {
-namespace protobuf {
-
-Service::~Service() {}
-RpcChannel::~RpcChannel() {}
-RpcController::~RpcController() {}
+#ifdef TEST_ARENA_PRIVATE_CONSTRUCTOR
 
-}  // namespace protobuf
+namespace google {
+void ArenaPrivateConstructor() {
+  google::protobuf::Arena arena;
+  protobuf_unittest::TestAllTypes message(&arena);
+}
 
+#endif
 }  // namespace google