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

media/base/audio_video_metadata_extractor.h

 // Copyright 2014 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_VIDEO_METADATA_EXTRACTOR_H_
 #define MEDIA_BASE_AUDIO_VIDEO_METADATA_EXTRACTOR_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "media/base/media_export.h"
 
 struct AVDictionary;
 
 namespace media {
 
 class DataSource;
 
 // This class extracts a string dictionary of metadata tags for audio and video
 // files. It also provides the format name.
 class MEDIA_EXPORT AudioVideoMetadataExtractor {
  public:
   typedef std::map<std::string, std::string> TagDictionary;
 
   struct StreamInfo {
     StreamInfo();
+    StreamInfo(const StreamInfo& other);
     ~StreamInfo();
     std::string type;
     TagDictionary tags;
   };
 
   typedef std::vector<StreamInfo> StreamInfoVector;
 
   AudioVideoMetadataExtractor();
   ~AudioVideoMetadataExtractor();
 
@@ skipping 58 matching lines @@
   StreamInfoVector stream_infos_;
 
   std::vector<std::string> attached_images_bytes_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioVideoMetadataExtractor);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_VIDEO_METADATA_EXTRACTOR_H_