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

third_party/protobuf/objectivec/GPBUnknownField.m

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // 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.
@@ skipping 13 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #import "GPBUnknownField_PackagePrivate.h"
 
 #import "GPBArray.h"
-#import "GPBCodedOutputStream.h"
+#import "GPBCodedOutputStream_PackagePrivate.h"
 
 @implementation GPBUnknownField {
  @protected
   int32_t number_;
   GPBUInt64Array *mutableVarintList_;
   GPBUInt32Array *mutableFixed32List_;
   GPBUInt64Array *mutableFixed64List_;
-  NSMutableArray *mutableLengthDelimitedList_;
-  NSMutableArray *mutableGroupList_;
+  NSMutableArray<NSData*> *mutableLengthDelimitedList_;
+  NSMutableArray<GPBUnknownFieldSet*> *mutableGroupList_;
 }
 
 @synthesize number = number_;
 @synthesize varintList = mutableVarintList_;
 @synthesize fixed32List = mutableFixed32List_;
 @synthesize fixed64List = mutableFixed64List_;
 @synthesize lengthDelimitedList = mutableLengthDelimitedList_;
 @synthesize groupList = mutableGroupList_;
 
 - (instancetype)initWithNumber:(int32_t)number {
@@ skipping 263 matching lines @@
 
 - (void)addGroup:(GPBUnknownFieldSet *)value {
   if (mutableGroupList_ == nil) {
     mutableGroupList_ = [[NSMutableArray alloc] initWithObjects:&value count:1];
   } else {
     [mutableGroupList_ addObject:value];
   }
 }
 
 @end