Move libvpx from DEPS to src

third_party/libvpx/source/libvpx/vp9/encoder/vp9_write_bit_buffer.h

Index: third_party/libvpx/source/libvpx/vp9/encoder/vp9_write_bit_buffer.h
diff --git a/third_party/libvpx/source/libvpx/vp9/encoder/vp9_write_bit_buffer.h b/third_party/libvpx/source/libvpx/vp9/encoder/vp9_write_bit_buffer.h
new file mode 100644
index 0000000000000000000000000000000000000000..59f9bbe30f3f9d9dd6d38dfda29d18feec0ec99c
--- /dev/null
+++ b/third_party/libvpx/source/libvpx/vp9/encoder/vp9_write_bit_buffer.h
@@ -0,0 +1,36 @@
+/*
+ *  Copyright (c) 2013 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef VP9_ENCODER_VP9_WRITE_BIT_BUFFER_H_
+#define VP9_ENCODER_VP9_WRITE_BIT_BUFFER_H_
+
+#include "vpx/vpx_integer.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct vp9_write_bit_buffer {
+  uint8_t *bit_buffer;
+  size_t bit_offset;
+};
+
+size_t vp9_wb_bytes_written(const struct vp9_write_bit_buffer *wb);
+
+void vp9_wb_write_bit(struct vp9_write_bit_buffer *wb, int bit);
+
+void vp9_wb_write_literal(struct vp9_write_bit_buffer *wb, int data, int bits);
+
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VP9_ENCODER_VP9_WRITE_BIT_BUFFER_H_