Revert "third_party/protobuf: Update to HEAD (83d681ee2c)"

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 d5f7779ec9b3ae0ecf11cb6918a064972e78c92c..37def58d034e51270765d0e6efe28dc78d8203cf 100644
--- a/third_party/protobuf/src/google/protobuf/stubs/once_unittest.cc
+++ b/third_party/protobuf/src/google/protobuf/stubs/once_unittest.cc
@@ -43,6 +43,7 @@
 
 namespace google {
 namespace protobuf {
+using internal::NewCallback;
 namespace {
 
 class OnceInitTest : public testing::Test {
@@ -127,11 +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));
+        internal::NewCallback(this, &OnceInitTest::InitRecursiveOnce));
   }
 
   enum State {