Fix Any json encoding/decoding for ruby. (#5592)

* Fix Any json encoding/decoding for ruby.

* Revert unnecessary changes

conformance/failure_list_ruby.txt

@@ -5,6 +5,7 @@ Recommended.Proto3.JsonInput.BytesFieldBase64Url.JsonOutput
 Recommended.Proto3.JsonInput.BytesFieldBase64Url.ProtobufOutput
 Recommended.Proto3.JsonInput.DurationHas3FractionalDigits.Validator
 Recommended.Proto3.JsonInput.DurationHas6FractionalDigits.Validator
+Recommended.Proto3.JsonInput.FieldMaskInvalidCharacter
 Recommended.Proto3.JsonInput.Int64FieldBeString.Validator
 Recommended.Proto3.JsonInput.MapFieldValueIsNull
 Recommended.Proto3.JsonInput.RepeatedFieldMessageElementIsNull
@@ -18,26 +19,6 @@ Recommended.Proto3.JsonInput.TimestampHas6FractionalDigits.Validator
 Recommended.Proto3.JsonInput.Uint64FieldBeString.Validator
 Required.DurationProtoInputTooLarge.JsonOutput
 Required.DurationProtoInputTooSmall.JsonOutput
-Required.Proto3.JsonInput.Any.JsonOutput
-Required.Proto3.JsonInput.Any.ProtobufOutput
-Required.Proto3.JsonInput.AnyNested.JsonOutput
-Required.Proto3.JsonInput.AnyNested.ProtobufOutput
-Required.Proto3.JsonInput.AnyUnorderedTypeTag.JsonOutput
-Required.Proto3.JsonInput.AnyUnorderedTypeTag.ProtobufOutput
-Required.Proto3.JsonInput.AnyWithDuration.JsonOutput
-Required.Proto3.JsonInput.AnyWithDuration.ProtobufOutput
-Required.Proto3.JsonInput.AnyWithFieldMask.JsonOutput
-Required.Proto3.JsonInput.AnyWithFieldMask.ProtobufOutput
-Required.Proto3.JsonInput.AnyWithInt32ValueWrapper.JsonOutput
-Required.Proto3.JsonInput.AnyWithInt32ValueWrapper.ProtobufOutput
-Required.Proto3.JsonInput.AnyWithStruct.JsonOutput
-Required.Proto3.JsonInput.AnyWithStruct.ProtobufOutput
-Required.Proto3.JsonInput.AnyWithTimestamp.JsonOutput
-Required.Proto3.JsonInput.AnyWithTimestamp.ProtobufOutput
-Required.Proto3.JsonInput.AnyWithValueForInteger.JsonOutput
-Required.Proto3.JsonInput.AnyWithValueForInteger.ProtobufOutput
-Required.Proto3.JsonInput.AnyWithValueForJsonObject.JsonOutput
-Required.Proto3.JsonInput.AnyWithValueForJsonObject.ProtobufOutput
 Required.Proto3.JsonInput.DoubleFieldMaxNegativeValue.JsonOutput
 Required.Proto3.JsonInput.DoubleFieldMaxNegativeValue.ProtobufOutput
 Required.Proto3.JsonInput.DoubleFieldMinPositiveValue.JsonOutput
@@ -45,8 +26,6 @@ Required.Proto3.JsonInput.DoubleFieldMinPositiveValue.ProtobufOutput
 Required.Proto3.JsonInput.DoubleFieldNan.JsonOutput
 Required.Proto3.JsonInput.DurationMinValue.JsonOutput
 Required.Proto3.JsonInput.DurationRepeatedValue.JsonOutput
-Required.Proto3.JsonInput.FieldMask.JsonOutput
-Required.Proto3.JsonInput.FieldMask.ProtobufOutput
 Required.Proto3.JsonInput.FloatFieldInfinity.JsonOutput
 Required.Proto3.JsonInput.FloatFieldNan.JsonOutput
 Required.Proto3.JsonInput.FloatFieldNegativeInfinity.JsonOutput

ruby/ext/google/protobuf_c/protobuf.h

@@ -196,6 +196,8 @@ VALUE DescriptorPool_build(int argc, VALUE* argv, VALUE _self);
 VALUE DescriptorPool_lookup(VALUE _self, VALUE name);
 VALUE DescriptorPool_generated_pool(VALUE _self);
 
+extern VALUE generated_pool;
+
 void Descriptor_mark(void* _self);
 void Descriptor_free(void* _self);
 VALUE Descriptor_alloc(VALUE klass);