Move libvpx from DEPS to src

third_party/libvpx/source/libvpx/third_party/libwebm/mkvreader.hpp

Index: third_party/libvpx/source/libvpx/third_party/libwebm/mkvreader.hpp
diff --git a/third_party/libvpx/source/libvpx/third_party/libwebm/mkvreader.hpp b/third_party/libvpx/source/libvpx/third_party/libwebm/mkvreader.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..82ebad54444a1faf1769618091dafec004a93a8c
--- /dev/null
+++ b/third_party/libvpx/source/libvpx/third_party/libwebm/mkvreader.hpp
@@ -0,0 +1,45 @@
+// Copyright (c) 2010 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 MKVREADER_HPP
+#define MKVREADER_HPP
+
+#include "mkvparser.hpp"
+#include <cstdio>
+
+namespace mkvparser {
+
+class MkvReader : public IMkvReader {
+ public:
+  MkvReader();
+  explicit MkvReader(FILE* fp);
+  virtual ~MkvReader();
+
+  int Open(const char*);
+  void Close();
+
+  virtual int Read(long long position, long length, unsigned char* buffer);
+  virtual int Length(long long* total, long long* available);
+
+ private:
+  MkvReader(const MkvReader&);
+  MkvReader& operator=(const MkvReader&);
+
+  // Determines the size of the file. This is called either by the constructor
+  // or by the Open function depending on file ownership. Returns true on
+  // success.
+  bool GetFileSize();
+
+  long long m_length;
+  FILE* m_file;
+  bool reader_owns_file_;
+};
+
+}  // end namespace mkvparser
+
+#endif  // MKVREADER_HPP