media: Add out-of-line copy ctors for complex classes.

media/base/audio_decoder_config.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_AUDIO_DECODER_CONFIG_H_
 #define MEDIA_BASE_AUDIO_DECODER_CONFIG_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 50 matching lines @@
   AudioDecoderConfig();
 
   // Constructs an initialized object.
   AudioDecoderConfig(AudioCodec codec,
                      SampleFormat sample_format,
                      ChannelLayout channel_layout,
                      int samples_per_second,
                      const std::vector<uint8_t>& extra_data,
                      bool is_encrypted);
 
+  AudioDecoderConfig(const AudioDecoderConfig& other);
+
   ~AudioDecoderConfig();
 
   // Resets the internal state of this object. |codec_delay| is in frames.
   void Initialize(AudioCodec codec,
                   SampleFormat sample_format,
                   ChannelLayout channel_layout,
                   int samples_per_second,
                   const std::vector<uint8_t>& extra_data,
                   bool is_encrypted,
                   base::TimeDelta seek_preroll,
@@ skipping 50 matching lines @@
   int codec_delay_;
 
   // Not using DISALLOW_COPY_AND_ASSIGN here intentionally to allow the compiler
   // generated copy constructor and assignment operator. Since the extra data is
   // typically small, the performance impact is minimal.
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_DECODER_CONFIG_H_