Added brotli enc/ and tools/ directories.

third_party/brotli/enc/encode_parallel.h

Index: third_party/brotli/enc/encode_parallel.h
diff --git a/third_party/brotli/enc/encode_parallel.h b/third_party/brotli/enc/encode_parallel.h
new file mode 100644
index 0000000000000000000000000000000000000000..8d637b7c02eec22f0028e05961d89bf17cf34d3f
--- /dev/null
+++ b/third_party/brotli/enc/encode_parallel.h
@@ -0,0 +1,28 @@
+/* Copyright 2013 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+// API for parallel Brotli compression
+// Note that this is only a proof of concept currently and not part of the
+// final API yet.
+
+#ifndef BROTLI_ENC_ENCODE_PARALLEL_H_
+#define BROTLI_ENC_ENCODE_PARALLEL_H_
+
+
+#include "./encode.h"
+#include "./types.h"
+
+namespace brotli {
+
+int BrotliCompressBufferParallel(BrotliParams params,
+                                 size_t input_size,
+                                 const uint8_t* input_buffer,
+                                 size_t* encoded_size,
+                                 uint8_t* encoded_buffer);
+
+}  // namespace brotli
+
+#endif  // BROTLI_ENC_ENCODE_PARALLEL_H_