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diff --git a/src/core/transport/chttp2/bin_encoder.h b/src/core/transport/chttp2/bin_encoder.h
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+++ b/src/core/transport/chttp2/bin_encoder.h
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+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * 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.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * 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.
+ *
+ */
+
+#ifndef __GRPC_INTERNAL_TRANSPORT_CHTTP2_BIN_ENCODER_H_
+#define __GRPC_INTERNAL_TRANSPORT_CHTTP2_BIN_ENCODER_H_
+
+#include <grpc/support/slice.h>
+
+/* base64 encode a slice. Returns a new slice, does not take ownership of the
+   input */
+gpr_slice grpc_chttp2_base64_encode(gpr_slice input);
+
+/* Compress a slice with the static huffman encoder detailed in the hpack
+   standard. Returns a new slice, does not take ownership of the input */
+gpr_slice grpc_chttp2_huffman_compress(gpr_slice input);
+
+/* equivalent to:
+   gpr_slice x = grpc_chttp2_base64_encode(input);
+   gpr_slice y = grpc_chttp2_huffman_compress(x);
+   gpr_slice_unref(x);
+   return y; */
+gpr_slice grpc_chttp2_base64_encode_and_huffman_compress(gpr_slice input);
+
+#endif /* __GRPC_INTERNAL_TRANSPORT_CHTTP2_BIN_ENCODER_H_ */