Remove final from rtc::Buffer.

webrtc/base/buffer.h

 /*
  *  Copyright 2004 The WebRTC 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.
  */
 
@@ skipping 26 matching lines @@
   static int F(char*);
 
  public:
   using t = decltype(F(static_cast<T*>(nullptr)));
 };
 
 }  // namespace internal
 
 // Basic buffer class, can be grown and shrunk dynamically.
 // Unlike std::string/vector, does not initialize data when expanding capacity.
-class Buffer final {
+class Buffer {
  public:
   Buffer();                   // An empty buffer.
   Buffer(const Buffer& buf);  // Copy size and contents of an existing buffer.
   Buffer(Buffer&& buf);       // Move contents from an existing buffer.
 
   // Construct a buffer with the specified number of uninitialized bytes.
   explicit Buffer(size_t size);
   Buffer(size_t size, size_t capacity);
 
   // Construct a buffer and copy the specified number of bytes into it. The
@@ skipping 159 matching lines @@
   }
 
   size_t size_;
   size_t capacity_;
   scoped_ptr<uint8_t[]> data_;
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_BUFFER_H_