Update //third_party/protobuf to version 3.

third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_field.cc

Index: third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_field.cc
diff --git a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_field.cc b/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_field.cc
index 0786176bac44033df9af55ffff0a10ee711fef9e..8d47d4e086999a2105f1aa244f62f9a5e4929b3f 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_field.cc
+++ b/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_field.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
@@ -33,14 +33,21 @@
 //  Sanjay Ghemawat, Jeff Dean, and others.
 
 #include <google/protobuf/compiler/cpp/cpp_field.h>
+#include <memory>
+#ifndef _SHARED_PTR_H
+#include <google/protobuf/stubs/shared_ptr.h>
+#endif
+
 #include <google/protobuf/compiler/cpp/cpp_helpers.h>
 #include <google/protobuf/compiler/cpp/cpp_primitive_field.h>
 #include <google/protobuf/compiler/cpp/cpp_string_field.h>
 #include <google/protobuf/compiler/cpp/cpp_enum_field.h>
+#include <google/protobuf/compiler/cpp/cpp_map_field.h>
 #include <google/protobuf/compiler/cpp/cpp_message_field.h>
 #include <google/protobuf/descriptor.pb.h>
 #include <google/protobuf/wire_format.h>
 #include <google/protobuf/io/printer.h>
+#include <google/protobuf/stubs/logging.h>
 #include <google/protobuf/stubs/common.h>
 #include <google/protobuf/stubs/strutil.h>
 
@@ -60,12 +67,41 @@ void SetCommonFieldVariables(const FieldDescriptor* descriptor,
   (*variables)["classname"] = ClassName(FieldScope(descriptor), false);
   (*variables)["declared_type"] = DeclaredTypeMethodName(descriptor->type());
 
+  // non_null_ptr_to_name is usable only if has_$name$ is true.  It yields a
+  // pointer that will not be NULL.  Subclasses of FieldGenerator may set
+  // (*variables)["non_null_ptr_to_name"] differently.
+  (*variables)["non_null_ptr_to_name"] =
+      StrCat("&this->", FieldName(descriptor), "()");
+
   (*variables)["tag_size"] = SimpleItoa(
     WireFormat::TagSize(descriptor->number(), descriptor->type()));
   (*variables)["deprecation"] = descriptor->options().deprecated()
       ? " PROTOBUF_DEPRECATED" : "";
 
   (*variables)["cppget"] = "Get";
+
+  if (HasFieldPresence(descriptor->file())) {
+    (*variables)["set_hasbit"] =
+        "set_has_" + FieldName(descriptor) + "();";
+    (*variables)["clear_hasbit"] =
+        "clear_has_" + FieldName(descriptor) + "();";
+  } else {
+    (*variables)["set_hasbit"] = "";
+    (*variables)["clear_hasbit"] = "";
+  }
+
+  // By default, empty string, so that generic code used for both oneofs and
+  // singular fields can be written.
+  (*variables)["oneof_prefix"] = "";
+}
+
+void SetCommonOneofFieldVariables(const FieldDescriptor* descriptor,
+                                  map<string, string>* variables) {
+  const string prefix = descriptor->containing_oneof()->name() + "_.";
+  (*variables)["oneof_prefix"] = prefix;
+  (*variables)["oneof_name"] = descriptor->containing_oneof()->name();
+  (*variables)["non_null_ptr_to_name"] =
+      StrCat(prefix, (*variables)["name"], "_");
 }
 
 FieldGenerator::~FieldGenerator() {}
@@ -84,8 +120,9 @@ GenerateMergeFromCodedStreamWithPacking(io::Printer* printer) const {
 
 FieldGeneratorMap::FieldGeneratorMap(const Descriptor* descriptor,
                                      const Options& options)
-  : descriptor_(descriptor),
-    field_generators_(new scoped_ptr<FieldGenerator>[descriptor->field_count()]) {
+    : descriptor_(descriptor),
+      field_generators_(
+          new google::protobuf::scoped_ptr<FieldGenerator>[descriptor->field_count()]) {
   // Construct all the FieldGenerators.
   for (int i = 0; i < descriptor->field_count(); i++) {
     field_generators_[i].reset(MakeGenerator(descriptor->field(i), options));
@@ -97,7 +134,11 @@ FieldGenerator* FieldGeneratorMap::MakeGenerator(const FieldDescriptor* field,
   if (field->is_repeated()) {
     switch (field->cpp_type()) {
       case FieldDescriptor::CPPTYPE_MESSAGE:
-        return new RepeatedMessageFieldGenerator(field, options);
+        if (field->is_map()) {
+          return new MapFieldGenerator(field, options);
+        } else {
+          return new RepeatedMessageFieldGenerator(field, options);
+        }
       case FieldDescriptor::CPPTYPE_STRING:
         switch (field->options().ctype()) {
           default:  // RepeatedStringFieldGenerator handles unknown ctypes.
@@ -109,6 +150,21 @@ FieldGenerator* FieldGeneratorMap::MakeGenerator(const FieldDescriptor* field,
       default:
         return new RepeatedPrimitiveFieldGenerator(field, options);
     }
+  } else if (field->containing_oneof()) {
+    switch (field->cpp_type()) {
+      case FieldDescriptor::CPPTYPE_MESSAGE:
+        return new MessageOneofFieldGenerator(field, options);
+      case FieldDescriptor::CPPTYPE_STRING:
+        switch (field->options().ctype()) {
+          default:  // StringOneofFieldGenerator handles unknown ctypes.
+          case FieldOptions::STRING:
+            return new StringOneofFieldGenerator(field, options);
+        }
+      case FieldDescriptor::CPPTYPE_ENUM:
+        return new EnumOneofFieldGenerator(field, options);
+      default:
+        return new PrimitiveOneofFieldGenerator(field, options);
+    }
   } else {
     switch (field->cpp_type()) {
       case FieldDescriptor::CPPTYPE_MESSAGE: