Add brotli compressor

This commit is for the encoder for brotli compression format.
Brotli is a generic byte-level compression algorithm.

brotli/enc/encode.h

@@ -0,0 +1,37 @@
+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// API for Brotli compression
+
+#ifndef BROTLI_ENC_ENCODE_H_
+#define BROTLI_ENC_ENCODE_H_
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string>
+
+namespace brotli {
+
+// Compresses the data in input_buffer into encoded_buffer, and sets
+// *encoded_size to the compressed length.
+// Returns 0 if there was an error and 1 otherwise.
+int BrotliCompressBuffer(size_t input_size,
+                         const uint8_t* input_buffer,
+                         size_t* encoded_size,
+                         uint8_t* encoded_buffer);
+
+
+}  // namespace brotli
+
+#endif  // BROTLI_ENC_ENCODE_H_