Dynamically enable packet coalescing by channel args
diff --git a/templates/gRPC-Core.podspec.template b/templates/gRPC-Core.podspec.template
index 1b97d18..0738b72 100644
--- a/templates/gRPC-Core.podspec.template
+++ b/templates/gRPC-Core.podspec.template
@@ -161,7 +161,8 @@
 
     s.subspec 'Cronet-Interface' do |ss|
       ss.header_mappings_dir = 'include/grpc'
-      ss.source_files = 'include/grpc/grpc_cronet.h'
+      ss.source_files = 'include/grpc/grpc_cronet.h',
+                        'src/core/ext/transport/cronet/transport/cronet_transport.h'
     end
 
     s.subspec 'Cronet-Implementation' do |ss|