Pull new version of protobuf sources.

third_party/protobuf/src/google/protobuf/metadata.cc

Index: third_party/protobuf/src/google/protobuf/metadata.cc
diff --git a/third_party/protobuf/src/google/protobuf/service.cc b/third_party/protobuf/src/google/protobuf/metadata.cc
similarity index 82%
copy from third_party/protobuf/src/google/protobuf/service.cc
copy to third_party/protobuf/src/google/protobuf/metadata.cc
index caf968ca5b4d46115c87a504b6a09d1358356884..99d2cf9021813da6418177838fb99ec59a91ca78 100644
--- a/third_party/protobuf/src/google/protobuf/service.cc
+++ b/third_party/protobuf/src/google/protobuf/metadata.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/
+// Copyright 2015 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
@@ -28,19 +28,15 @@
 // (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.
-
-#include <google/protobuf/service.h>
+#include <google/protobuf/metadata.h>
 
 namespace google {
 namespace protobuf {
+namespace internal {
 
-Service::~Service() {}
-RpcChannel::~RpcChannel() {}
-RpcController::~RpcController() {}
+InternalMetadataWithArena::InternalMetadataWithArena(Arena* arena)
+    : ptr_ (arena) {}
 
+}  // namespace internal
 }  // namespace protobuf
-
 }  // namespace google