Update //third_party/protobuf to version 3.

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

 // 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
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
@@ skipping 280 matching lines @@
     sub_vars["type"] = ClassName(type, true);
 
     printer->Print(sub_vars,
       "    case $index$:\n"
       "      return $type$::default_instance();\n");
   }
 
   printer->Print(vars_,
     "    default:\n"
     "      GOOGLE_LOG(FATAL) << \"Bad method index; this should never happen.\";\n"
-    "      return *reinterpret_cast< ::google::protobuf::Message*>(NULL);\n"
+    "      return *static_cast< ::google::protobuf::Message*>(NULL);\n"
     "  }\n"
     "}\n"
     "\n");
 }
 
 void ServiceGenerator::GenerateStubMethods(io::Printer* printer) {
   for (int i = 0; i < descriptor_->method_count(); i++) {
     const MethodDescriptor* method = descriptor_->method(i);
     map<string, string> sub_vars;
     sub_vars["classname"] = descriptor_->name();
@@ skipping 10 matching lines @@
       "  channel_->CallMethod(descriptor()->method($index$),\n"
       "                       controller, request, response, done);\n"
       "}\n");
   }
 }
 
 }  // namespace cpp
 }  // namespace compiler
 }  // namespace protobuf
 }  // namespace google