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

media/video/video_decode_accelerator.cc

 // Copyright (c) 2011 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/video/video_decode_accelerator.h"
 
 #include <GLES2/gl2.h>
 #include "base/logging.h"
 
 namespace media {
@@ skipping 33 matching lines @@
   return GL_RGBA;
 }
 
 VideoDecodeAccelerator::SupportedProfile::SupportedProfile()
     : profile(media::VIDEO_CODEC_PROFILE_UNKNOWN) {}
 
 VideoDecodeAccelerator::SupportedProfile::~SupportedProfile() {}
 
 VideoDecodeAccelerator::Capabilities::Capabilities() : flags(NO_FLAGS) {}
 
+VideoDecodeAccelerator::Capabilities::Capabilities(const Capabilities& other) =
+    default;
+
 VideoDecodeAccelerator::Capabilities::~Capabilities() {}
 
 std::string VideoDecodeAccelerator::Capabilities::AsHumanReadableString()
     const {
   std::ostringstream s;
   s << "[";
   for (const SupportedProfile& sp : supported_profiles) {
     s << " " << GetProfileName(sp.profile) << ": " << sp.min_resolution.width()
       << "x" << sp.min_resolution.height() << "->" << sp.max_resolution.width()
       << "x" << sp.max_resolution.height();
   }
   s << "]";
   return s.str();
 }
 
 } // namespace media
 
 namespace std {
 
 void default_delete<media::VideoDecodeAccelerator>::operator()(
     media::VideoDecodeAccelerator* vda) const {
   vda->Destroy();
 }
 
 }  // namespace std