Update third_party/protobuf to protobuf-v3.0.0-beta-3

third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_enum.h

Index: third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_enum.h
diff --git a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_enum.h b/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_enum.h
index f3aa72e4409addc31e1507826e31cf5ff8297812..90edf0017d55eb2637b7f3566c58e8cc3b9cbe15 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_enum.h
+++ b/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_enum.h
@@ -35,12 +35,12 @@
 #ifndef GOOGLE_PROTOBUF_COMPILER_CPP_ENUM_H__
 #define GOOGLE_PROTOBUF_COMPILER_CPP_ENUM_H__
 
+#include <map>
 #include <set>
 #include <string>
 #include <google/protobuf/compiler/cpp/cpp_options.h>
 #include <google/protobuf/descriptor.h>
 
-
 namespace google {
 namespace protobuf {
   namespace io {
@@ -55,8 +55,7 @@ namespace cpp {
 class EnumGenerator {
  public:
   // See generator.cc for the meaning of dllexport_decl.
-  explicit EnumGenerator(const EnumDescriptor* descriptor,
-                         const Options& options);
+  EnumGenerator(const EnumDescriptor* descriptor, const Options& options);
   ~EnumGenerator();
 
   // Header stuff.
@@ -64,8 +63,10 @@ class EnumGenerator {
   // Fills the name to use when declaring the enum. This is for use when
   // generating other .proto.h files. This code should be placed within the
   // enum's package namespace, but NOT within any class, even for nested
-  // enums.
-  void FillForwardDeclaration(set<string>* enum_names);
+  // enums. A given key in enum_names will map from an enum class name to the
+  // EnumDescriptor that was responsible for its inclusion in the map. This can
+  // be used to associate the descriptor with the code generated for it.
+  void FillForwardDeclaration(map<string, const EnumDescriptor*>* enum_names);
 
   // Generate header code defining the enum.  This code should be placed
   // within the enum's package namespace, but NOT within any class, even for
@@ -94,10 +95,10 @@ class EnumGenerator {
 
  private:
   const EnumDescriptor* descriptor_;
-  string classname_;
-  Options options_;
+  const string classname_;
+  const Options& options_;
   // whether to generate the *_ARRAYSIZE constant.
-  bool generate_array_size_;
+  const bool generate_array_size_;
 
   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(EnumGenerator);
 };