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

third_party/protobuf/objectivec/Tests/GPBMessageTests+Merge.m

 // Protocol Buffers - Google's data interchange format
 // Copyright 2015 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 657 matching lines @@
 
 #pragma mark - Subset from from map_tests.cc
 
 // TEST(GeneratedMapFieldTest, CopyFromMessageMap)
 - (void)testMap_CopyFromMessageMap {
   TestMessageMap *msg1 = [[TestMessageMap alloc] init];
   TestMessageMap *msg2 = [[TestMessageMap alloc] init];
 
   TestAllTypes *subMsg = [TestAllTypes message];
   subMsg.repeatedInt32Array = [GPBInt32Array arrayWithValue:100];
-  msg1.mapInt32Message = [GPBInt32ObjectDictionary dictionary];
   [msg1.mapInt32Message setObject:subMsg forKey:0];
   subMsg = nil;
 
   subMsg = [TestAllTypes message];
   subMsg.repeatedInt32Array = [GPBInt32Array arrayWithValue:101];
-  msg2.mapInt32Message = [GPBInt32ObjectDictionary dictionary];
-  
+
   [msg2.mapInt32Message setObject:subMsg forKey:0];
   subMsg = nil;
 
   [msg1 mergeFrom:msg2];
 
   // Checks repeated field is overwritten.
   XCTAssertEqual(msg1.mapInt32Message.count, 1U);
   subMsg = [msg1.mapInt32Message objectForKey:0];
   XCTAssertNotNil(subMsg);
   XCTAssertEqual(subMsg.repeatedInt32Array.count, 1U);
   XCTAssertEqual([subMsg.repeatedInt32Array valueAtIndex:0], 101);
 
   [msg2 release];
   [msg1 release];
 }
 
 @end