moved kMaxPayloadSizeForGet definition to C file

src/core/lib/channel/http_client_filter.c

@@ -43,6 +43,9 @@
 #define EXPECTED_CONTENT_TYPE "application/grpc"
 #define EXPECTED_CONTENT_TYPE_LENGTH sizeof(EXPECTED_CONTENT_TYPE) - 1
 
+/* default maximum size of payload eligable for GET request */
+static const size_t kMaxPayloadSizeForGet = 2048;
+
 typedef struct call_data {
   grpc_linked_mdelem method;
   grpc_linked_mdelem scheme;

src/core/lib/channel/http_client_filter.h

@@ -43,6 +43,5 @@ extern const grpc_channel_filter grpc_http_client_filter;
 
 /* Channel arg to determine maximum size of payload eligable for GET request */
 #define GRPC_ARG_MAX_PAYLOAD_SIZE_FOR_GET "grpc.max_payload_size_for_get"
-static const size_t kMaxPayloadSizeForGet = 2048;
 
 #endif /* GRPC_CORE_LIB_CHANNEL_HTTP_CLIENT_FILTER_H */