Pull new version of protobuf sources.

third_party/protobuf/objectivec/GPBUnknownField.h

Index: third_party/protobuf/objectivec/GPBUnknownField.h
diff --git a/third_party/protobuf/python/google/protobuf/internal/more_extensions.proto b/third_party/protobuf/objectivec/GPBUnknownField.h
similarity index 62%
copy from third_party/protobuf/python/google/protobuf/internal/more_extensions.proto
copy to third_party/protobuf/objectivec/GPBUnknownField.h
index e2d97010450d32f2d1dd7b3ec0d2d05bf93435cb..12d72a9acd5cc0b2de0b9d99c430c5363a872a5b 100644
--- a/third_party/protobuf/python/google/protobuf/internal/more_extensions.proto
+++ b/third_party/protobuf/objectivec/GPBUnknownField.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 +28,33 @@
 // (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: robinson@google.com (Will Robinson)
+#import <Foundation/Foundation.h>
 
+@class GPBCodedOutputStream;
+@class GPBUInt32Array;
+@class GPBUInt64Array;
+@class GPBUnknownFieldSet;
 
-package google.protobuf.internal;
+NS_ASSUME_NONNULL_BEGIN
 
+@interface GPBUnknownField : NSObject<NSCopying>
 
-message TopLevelMessage {
-  optional ExtendedMessage submessage = 1;
-}
+@property(nonatomic, readonly, assign) int32_t number;
 
+// Only one of these will be set.
+@property(nonatomic, readonly, strong) GPBUInt64Array *varintList;
+@property(nonatomic, readonly, strong) GPBUInt32Array *fixed32List;
+@property(nonatomic, readonly, strong) GPBUInt64Array *fixed64List;
+@property(nonatomic, readonly, strong) NSArray *lengthDelimitedList;  // NSData
+@property(nonatomic, readonly, strong) NSArray *groupList;  // GPBUnknownFieldSet
 
-message ExtendedMessage {
-  extensions 1 to max;
-}
+// Only one of these should be used per Field.
+- (void)addVarint:(uint64_t)value;
+- (void)addFixed32:(uint32_t)value;
+- (void)addFixed64:(uint64_t)value;
+- (void)addLengthDelimited:(NSData *)value;
+- (void)addGroup:(GPBUnknownFieldSet *)value;
 
+@end
 
-message ForeignMessage {
-  optional int32 foreign_message_int = 1;
-}
-
-
-extend ExtendedMessage {
-  optional int32 optional_int_extension = 1;
-  optional ForeignMessage optional_message_extension = 2;
-
-  repeated int32 repeated_int_extension = 3;
-  repeated ForeignMessage repeated_message_extension = 4;
-}
+NS_ASSUME_NONNULL_END