Update //third_party/protobuf to version 3.

third_party/protobuf/src/google/protobuf/stubs/once_unittest.cc

Index: third_party/protobuf/src/google/protobuf/stubs/once_unittest.cc
diff --git a/third_party/protobuf/src/google/protobuf/stubs/once_unittest.cc b/third_party/protobuf/src/google/protobuf/stubs/once_unittest.cc
index b8f86a0fc8bff99e1f419f173915c7db0fcc6f83..37def58d034e51270765d0e6efe28dc78d8203cf 100644
--- a/third_party/protobuf/src/google/protobuf/stubs/once_unittest.cc
+++ b/third_party/protobuf/src/google/protobuf/stubs/once_unittest.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
@@ -43,6 +43,7 @@
 
 namespace google {
 namespace protobuf {
+using internal::NewCallback;
 namespace {
 
 class OnceInitTest : public testing::Test {
@@ -127,10 +128,11 @@ class OnceInitTest : public testing::Test {
   };
 
   TestThread* RunInitOnceInNewThread() {
-    return new TestThread(NewCallback(this, &OnceInitTest::InitOnce));
+    return new TestThread(internal::NewCallback(this, &OnceInitTest::InitOnce));
   }
   TestThread* RunInitRecursiveOnceInNewThread() {
-    return new TestThread(NewCallback(this, &OnceInitTest::InitRecursiveOnce));
+    return new TestThread(
+        internal::NewCallback(this, &OnceInitTest::InitRecursiveOnce));
   }
 
   enum State {