Objective-C changes

src/objective-c/GRPCClient/private/GRPCCompletionQueue.m

@@ -48,9 +48,7 @@
 
 - (instancetype)init {
   if ((self = [super init])) {
-    _unmanagedQueue = grpc_completion_queue_create(GRPC_CQ_NEXT,
-                                                   GRPC_CQ_DEFAULT_POLLING,
-                                                   NULL);
+    _unmanagedQueue = grpc_completion_queue_create_for_next(NULL);
 
     // This is for the following block to capture the pointer by value (instead
     // of retaining self and doing self->_unmanagedQueue). This is essential

src/objective-c/tests/CoreCronetEnd2EndTests/CoreCronetEnd2EndTests.m

@@ -79,8 +79,7 @@ static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
   gpr_join_host_port(&ffd->localaddr, "127.0.0.1", port);
 
   f.fixture_data = ffd;
-  f.cq = grpc_completion_queue_create(GRPC_CQ_NEXT, GRPC_CQ_DEFAULT_POLLING,
-                                      NULL);
+  f.cq = grpc_completion_queue_create_for_next(NULL);
 
   return f;
 }

src/objective-c/tests/CronetUnitTests/CronetUnitTests.m

@@ -160,9 +160,7 @@ unsigned int parse_h2_length(const char *field) {
   int port = grpc_pick_unused_port_or_die();
   char *addr;
   gpr_join_host_port(&addr, "127.0.0.1", port);
-  grpc_completion_queue *cq =
-          grpc_completion_queue_create(GRPC_CQ_NEXT, GRPC_CQ_DEFAULT_POLLING,
-                                       NULL);
+  grpc_completion_queue *cq = grpc_completion_queue_create_for_next(NULL);
   stream_engine *cronetEngine = [Cronet getGlobalEngine];
   grpc_channel *client =
       grpc_cronet_secure_channel_create(cronetEngine, addr, NULL, NULL);
@@ -296,9 +294,7 @@ unsigned int parse_h2_length(const char *field) {
   int port = grpc_pick_unused_port_or_die();
   char *addr;
   gpr_join_host_port(&addr, "127.0.0.1", port);
-  grpc_completion_queue *cq =
-          grpc_completion_queue_create(GRPC_CQ_NEXT, GRPC_CQ_DEFAULT_POLLING,
-                                       NULL);
+  grpc_completion_queue *cq = grpc_completion_queue_create_for_next(NULL);
   stream_engine *cronetEngine = [Cronet getGlobalEngine];
   grpc_channel *client =
       grpc_cronet_secure_channel_create(cronetEngine, addr, args, NULL);