Update //third_party/protobuf to version 3.

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

Index: third_party/protobuf/src/google/protobuf/compiler/csharp/csharp_generator.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_generator.h
similarity index 75%
copy from third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_options.h
copy to third_party/protobuf/src/google/protobuf/compiler/csharp/csharp_generator.h
index 787706629bd10fc72eb7811d9498f19dd0524d11..9b54e9149e7c2afd1533a90a7b782ff96ae7b3b6 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_options.h
+++ b/third_party/protobuf/src/google/protobuf/compiler/csharp/csharp_generator.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 +28,31 @@
 // (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_GENERATOR_H__
+#define GOOGLE_PROTOBUF_COMPILER_CSHARP_GENERATOR_H__
 
 #include <string>
 
-#include <google/protobuf/stubs/common.h>
+#include <google/protobuf/compiler/code_generator.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 csharp {
+
+class LIBPROTOC_EXPORT Generator
+    : public google::protobuf::compiler::CodeGenerator {
+  virtual bool Generate(
+      const FileDescriptor* file,
+      const string& parameter,
+      GeneratorContext* generator_context,
+      string* error) const;
 };
 
-}  // namespace cpp
+}  // namespace csharp
 }  // namespace compiler
 }  // namespace protobuf
+}  // namespace google
 
+#endif  // GOOGLE_PROTOBUF_COMPILER_CSHARP_GENERATOR_H__
 
-}  // namespace google
-#endif  // GOOGLE_PROTOBUF_COMPILER_CPP_OPTIONS_H__