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

media/formats/webm/tracks_builder.cc

 // 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.
 
 #include "media/formats/webm/tracks_builder.h"
 
 #include "base/logging.h"
 #include "media/formats/webm/webm_constants.h"
 
 namespace media {
@@ skipping 276 matching lines @@
     if (track_type == kWebMTrackTypeAudio) {
       CHECK_GT(audio_channels_, 0);
       CHECK_GT(audio_sampling_frequency_, 0.0);
     } else {
       CHECK_EQ(audio_channels_, -1);
       CHECK_EQ(audio_sampling_frequency_, -1.0);
     }
   }
 }
 
+TracksBuilder::Track::Track(const Track& other) = default;
+
 int TracksBuilder::Track::GetSize() const {
   return MasterElementSize(kWebMIdTrackEntry, GetPayloadSize());
 }
 
 int TracksBuilder::Track::GetVideoPayloadSize() const {
   int payload_size = 0;
 
   if (video_pixel_width_ >= 0)
     payload_size += UIntElementSize(kWebMIdPixelWidth, video_pixel_width_);
   if (video_pixel_height_ >= 0)
@@ skipping 79 matching lines @@
       WriteUIntElement(buf, buf_size, kWebMIdChannels, audio_channels_);
 
     if (audio_sampling_frequency_ >= 0) {
       WriteDoubleElement(buf, buf_size, kWebMIdSamplingFrequency,
           audio_sampling_frequency_);
     }
   }
 }
 
 }  // namespace media