Update //third_party/protobuf to version 3.

third_party/protobuf/src/google/protobuf/compiler/csharp/csharp_doc_comment.h

Index: third_party/protobuf/src/google/protobuf/compiler/csharp/csharp_doc_comment.h
diff --git a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_options.h b/third_party/protobuf/src/google/protobuf/compiler/csharp/csharp_doc_comment.h
similarity index 69%
copy from third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_options.h
copy to third_party/protobuf/src/google/protobuf/compiler/csharp/csharp_doc_comment.h
index 787706629bd10fc72eb7811d9498f19dd0524d11..75eb0ea04d16d523d5c5ee7c2f0a266178f51817 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_options.h
+++ b/third_party/protobuf/src/google/protobuf/compiler/csharp/csharp_doc_comment.h
@@ -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
@@ -28,31 +28,24 @@
 // (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: rennie@google.com (Jeffrey Rennie)
 
-#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_OPTIONS_H__
-#define GOOGLE_PROTOBUF_COMPILER_CPP_OPTIONS_H__
+#ifndef GOOGLE_PROTOBUF_COMPILER_CSHARP_DOC_COMMENT_H__
+#define GOOGLE_PROTOBUF_COMPILER_CSHARP_DOC_COMMENT_H__
 
-#include <string>
+#include <google/protobuf/io/printer.h>
+#include <google/protobuf/descriptor.h>
 
-#include <google/protobuf/stubs/common.h>
 namespace google {
 namespace protobuf {
 namespace compiler {
-namespace cpp {
-
-// Generator options:
-struct Options {
-  Options() : safe_boundary_check(false) {
-  }
-  string dllexport_decl;
-  bool safe_boundary_check;
-};
-
-}  // namespace cpp
+namespace csharp {
+    void WriteMessageDocComment(io::Printer* printer, const Descriptor* message);
+    void WritePropertyDocComment(io::Printer* printer, const FieldDescriptor* field);
+    void WriteEnumDocComment(io::Printer* printer, const EnumDescriptor* enumDescriptor);
+    void WriteEnumValueDocComment(io::Printer* printer, const EnumValueDescriptor* value);
+    void WriteMethodDocComment(io::Printer* printer, const MethodDescriptor* method);
+}  // namespace csharp
 }  // namespace compiler
 }  // namespace protobuf
-
-
 }  // namespace google
-#endif  // GOOGLE_PROTOBUF_COMPILER_CPP_OPTIONS_H__
+#endif  // GOOGLE_PROTOBUF_COMPILER_CSHARP_DOC_COMMENT_H__