Update //third_party/protobuf to version 3.

third_party/protobuf/src/google/protobuf/testing/file.cc

Index: third_party/protobuf/src/google/protobuf/testing/file.cc
diff --git a/third_party/protobuf/src/google/protobuf/testing/file.cc b/third_party/protobuf/src/google/protobuf/testing/file.cc
index e224781db572fc19e1a90a99c7201c243077e588..3d07b1276cf96698f95b367d65999de5e6eb2362 100644
--- a/third_party/protobuf/src/google/protobuf/testing/file.cc
+++ b/third_party/protobuf/src/google/protobuf/testing/file.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
@@ -82,6 +82,24 @@ void File::ReadFileToStringOrDie(const string& name, string* output) {
   GOOGLE_CHECK(ReadFileToString(name, output)) << "Could not read: " << name;
 }
 
+bool File::WriteStringToFile(const string& contents, const string& name) {
+  FILE* file = fopen(name.c_str(), "wb");
+  if (file == NULL) {
+    GOOGLE_LOG(ERROR) << "fopen(" << name << ", \"wb\"): " << strerror(errno);
+    return false;
+  }
+
+  if (fwrite(contents.data(), 1, contents.size(), file) != contents.size()) {
+    GOOGLE_LOG(ERROR) << "fwrite(" << name << "): " << strerror(errno);
+    return false;
+  }
+
+  if (fclose(file) != 0) {
+    return false;
+  }
+  return true;
+}
+
 void File::WriteStringToFileOrDie(const string& contents, const string& name) {
   FILE* file = fopen(name.c_str(), "wb");
   GOOGLE_CHECK(file != NULL)
@@ -115,6 +133,8 @@ bool File::RecursivelyCreateDir(const string& path, int mode) {
 
 void File::DeleteRecursively(const string& name,
                              void* dummy1, void* dummy2) {
+  if (name.empty()) return;
+
   // We don't care too much about error checking here since this is only used
   // in tests to delete temporary directories that are under /tmp anyway.
 
@@ -172,5 +192,9 @@ void File::DeleteRecursively(const string& name,
 #endif
 }
 
+bool File::ChangeWorkingDirectory(const string& new_working_directory) {
+  return chdir(new_working_directory.c_str()) == 0;
+}
+
 }  // namespace protobuf
 }  // namespace google