Update //third_party/protobuf to version 3.

third_party/protobuf/src/google/protobuf/arena_test_util.cc

Index: third_party/protobuf/src/google/protobuf/arena_test_util.cc
diff --git a/third_party/protobuf/src/google/protobuf/io/zero_copy_stream.cc b/third_party/protobuf/src/google/protobuf/arena_test_util.cc
similarity index 80%
copy from third_party/protobuf/src/google/protobuf/io/zero_copy_stream.cc
copy to third_party/protobuf/src/google/protobuf/arena_test_util.cc
index dad6ff14468d031f16baafb2f1ca567961251c43..df9c5bd6b488c174f03b62e57b67444c79192184 100644
--- a/third_party/protobuf/src/google/protobuf/io/zero_copy_stream.cc
+++ b/third_party/protobuf/src/google/protobuf/arena_test_util.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
@@ -28,21 +28,23 @@
 // (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/stubs/logging.h>
+#include <google/protobuf/stubs/common.h>
+#include <google/protobuf/arena_test_util.h>
 
-#include <google/protobuf/io/zero_copy_stream.h>
 
+#define EXPECT_EQ GOOGLE_CHECK_EQ
 
 namespace google {
 namespace protobuf {
-namespace io {
+namespace internal {
 
-ZeroCopyInputStream::~ZeroCopyInputStream() {}
-ZeroCopyOutputStream::~ZeroCopyOutputStream() {}
+NoHeapChecker::~NoHeapChecker() {
+  capture_alloc.Unhook();
+  EXPECT_EQ(0, capture_alloc.alloc_count());
+  EXPECT_EQ(0, capture_alloc.free_count());
+}
 
-
-}  // namespace io
+}  // namespace internal
 }  // namespace protobuf
 }  // namespace google