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

This patch adds out of line copy constructors for classes that our
clang-plugin considers heavy. This is an effort to enable copy
constructor checks by default.

BUG=436357
R=dalecurtis@chromium.org, dcheng@chromium.org, thakis@chromium.org

Review URL: https://codereview.chromium.org/1731403002

Cr-Commit-Position: refs/heads/master@{#377967}

38 files changed, 74 insertions, 0 deletions

diff --git a/media/base/audio_decoder_config.cc b/media/base/audio_decoder_config.cc
index 9d3f672..3f279f2 100644
--- a/media/base/audio_decoder_config.cc
+++ b/media/base/audio_decoder_config.cc
@@ -70,6 +70,9 @@ AudioDecoderConfig::AudioDecoderConfig(AudioCodec codec,
              extra_data, is_encrypted, base::TimeDelta(), 0);
 }
 
+AudioDecoderConfig::AudioDecoderConfig(const AudioDecoderConfig& other) =
+    default;
+
 void AudioDecoderConfig::Initialize(AudioCodec codec,
                                     SampleFormat sample_format,
                                     ChannelLayout channel_layout,
diff --git a/media/base/audio_decoder_config.h b/media/base/audio_decoder_config.h
index a0e262f..c3489cc 100644
--- a/media/base/audio_decoder_config.h
+++ b/media/base/audio_decoder_config.h
@@ -68,6 +68,8 @@ class MEDIA_EXPORT AudioDecoderConfig {
                      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.
diff --git a/media/base/audio_shifter.cc b/media/base/audio_shifter.cc
index c88af3a..6a268d3 100644
--- a/media/base/audio_shifter.cc
+++ b/media/base/audio_shifter.cc
@@ -82,6 +82,9 @@ AudioShifter::AudioQueueEntry::AudioQueueEntry(
     audio(audio_.release()) {
 }
 
+AudioShifter::AudioQueueEntry::AudioQueueEntry(const AudioQueueEntry& other) =
+    default;
+
 AudioShifter::AudioQueueEntry::~AudioQueueEntry() {}
 
 AudioShifter::AudioShifter(base::TimeDelta max_buffer_size,
diff --git a/media/base/audio_shifter.h b/media/base/audio_shifter.h
index 0156269..3429a2f 100644
--- a/media/base/audio_shifter.h
+++ b/media/base/audio_shifter.h
@@ -89,6 +89,7 @@ private:
   struct AudioQueueEntry {
     AudioQueueEntry(base::TimeTicks target_playout_time_,
                     scoped_ptr<AudioBus> audio_);
+    AudioQueueEntry(const AudioQueueEntry& other);
     ~AudioQueueEntry();
     base::TimeTicks target_playout_time;
     linked_ptr<AudioBus> audio;
diff --git a/media/base/audio_video_metadata_extractor.cc b/media/base/audio_video_metadata_extractor.cc
index 0ba36e1..5b92c15 100644
--- a/media/base/audio_video_metadata_extractor.cc
+++ b/media/base/audio_video_metadata_extractor.cc
@@ -54,6 +54,9 @@ const int kAttachedImageSizeLimit = 4 * 1024 * 1024;
 
 AudioVideoMetadataExtractor::StreamInfo::StreamInfo() {}
 
+AudioVideoMetadataExtractor::StreamInfo::StreamInfo(const StreamInfo& other) =
+    default;
+
 AudioVideoMetadataExtractor::StreamInfo::~StreamInfo() {}
 
 AudioVideoMetadataExtractor::AudioVideoMetadataExtractor()
diff --git a/media/base/audio_video_metadata_extractor.h b/media/base/audio_video_metadata_extractor.h
index 97f7a5b..4e5906d 100644
--- a/media/base/audio_video_metadata_extractor.h
+++ b/media/base/audio_video_metadata_extractor.h
@@ -26,6 +26,7 @@ class MEDIA_EXPORT AudioVideoMetadataExtractor {
 
   struct StreamInfo {
     StreamInfo();
+    StreamInfo(const StreamInfo& other);
     ~StreamInfo();
     std::string type;
     TagDictionary tags;
diff --git a/media/base/bitstream_buffer.cc b/media/base/bitstream_buffer.cc
index 49caf5b..5732981 100644
--- a/media/base/bitstream_buffer.cc
+++ b/media/base/bitstream_buffer.cc
@@ -23,6 +23,8 @@ BitstreamBuffer::BitstreamBuffer(int32_t id,
       size_(size),
       presentation_timestamp_(presentation_timestamp) {}
 
+BitstreamBuffer::BitstreamBuffer(const BitstreamBuffer& other) = default;
+
 BitstreamBuffer::~BitstreamBuffer() {}
 
 void BitstreamBuffer::SetDecryptConfig(const DecryptConfig& decrypt_config) {
diff --git a/media/base/bitstream_buffer.h b/media/base/bitstream_buffer.h
index fe3c8da3..9ceeaf89 100644
--- a/media/base/bitstream_buffer.h
+++ b/media/base/bitstream_buffer.h
@@ -28,6 +28,8 @@ class MEDIA_EXPORT BitstreamBuffer {
                   size_t size,
                   base::TimeDelta presentation_timestamp);
 
+  BitstreamBuffer(const BitstreamBuffer& other);
+
   ~BitstreamBuffer();
 
   void SetDecryptConfig(const DecryptConfig& decrypt_config);
diff --git a/media/base/cdm_key_information.cc b/media/base/cdm_key_information.cc
index 70d4464..efaed61 100644
--- a/media/base/cdm_key_information.cc
+++ b/media/base/cdm_key_information.cc
@@ -32,6 +32,8 @@ CdmKeyInformation::CdmKeyInformation(const uint8_t* key_id_data,
       status(status),
       system_code(system_code) {}
 
+CdmKeyInformation::CdmKeyInformation(const CdmKeyInformation& other) = default;
+
 CdmKeyInformation::~CdmKeyInformation() {
 }
 
diff --git a/media/base/cdm_key_information.h b/media/base/cdm_key_information.h
index 89c8112..7ed8eff 100644
--- a/media/base/cdm_key_information.h
+++ b/media/base/cdm_key_information.h
@@ -40,6 +40,7 @@ struct MEDIA_EXPORT CdmKeyInformation {
                     size_t key_id_length,
                     KeyStatus status,
                     uint32_t system_code);
+  CdmKeyInformation(const CdmKeyInformation& other);
   ~CdmKeyInformation();
 
   std::vector<uint8_t> key_id;
diff --git a/media/base/key_system_info.cc b/media/base/key_system_info.cc
index f36104a..da3586d 100644
--- a/media/base/key_system_info.cc
+++ b/media/base/key_system_info.cc
@@ -9,6 +9,8 @@ namespace media {
 KeySystemInfo::KeySystemInfo() {
 }
 
+KeySystemInfo::KeySystemInfo(const KeySystemInfo& other) = default;
+
 KeySystemInfo::~KeySystemInfo() {
 }
 
diff --git a/media/base/key_system_info.h b/media/base/key_system_info.h
index 0a9ba67..fe4dae7 100644
--- a/media/base/key_system_info.h
+++ b/media/base/key_system_info.h
@@ -28,6 +28,7 @@ namespace media {
 // the corresponding CDM.
 struct MEDIA_EXPORT KeySystemInfo {
   KeySystemInfo();
+  KeySystemInfo(const KeySystemInfo& other);
   ~KeySystemInfo();
 
   std::string key_system;
diff --git a/media/base/serial_runner.cc b/media/base/serial_runner.cc
index 2e085e3..6cb89cb 100644
--- a/media/base/serial_runner.cc
+++ b/media/base/serial_runner.cc
@@ -40,6 +40,7 @@ static void RunOnTaskRunner(
 }
 
 SerialRunner::Queue::Queue() {}
+SerialRunner::Queue::Queue(const Queue& other) = default;
 SerialRunner::Queue::~Queue() {}
 
 void SerialRunner::Queue::Push(const base::Closure& closure) {
diff --git a/media/base/serial_runner.h b/media/base/serial_runner.h
index 4847e4c..3adfd64 100644
--- a/media/base/serial_runner.h
+++ b/media/base/serial_runner.h
@@ -34,6 +34,7 @@ class MEDIA_EXPORT SerialRunner {
   class MEDIA_EXPORT Queue {
    public:
     Queue();
+    Queue(const Queue& other);
     ~Queue();
 
     void Push(const base::Closure& closure);
diff --git a/media/base/text_track_config.cc b/media/base/text_track_config.cc
index 0d4b11f6..dbd2b2d 100644
--- a/media/base/text_track_config.cc
+++ b/media/base/text_track_config.cc
@@ -20,6 +20,8 @@ TextTrackConfig::TextTrackConfig(TextKind kind,
       id_(id) {
 }
 
+TextTrackConfig::TextTrackConfig(const TextTrackConfig& other) = default;
+
 bool TextTrackConfig::Matches(const TextTrackConfig& config) const {
   return config.kind() == kind_ &&
          config.label() == label_ &&
diff --git a/media/base/text_track_config.h b/media/base/text_track_config.h
index 58efba4..33128df 100644
--- a/media/base/text_track_config.h
+++ b/media/base/text_track_config.h
@@ -23,6 +23,7 @@ enum TextKind {
 class MEDIA_EXPORT TextTrackConfig {
  public:
   TextTrackConfig();
+  TextTrackConfig(const TextTrackConfig& other);
   TextTrackConfig(TextKind kind,
                   const std::string& label,
                   const std::string& language,
diff --git a/media/base/video_decoder_config.cc b/media/base/video_decoder_config.cc
index dfe7254..930ffd9 100644
--- a/media/base/video_decoder_config.cc
+++ b/media/base/video_decoder_config.cc
@@ -55,6 +55,9 @@ VideoDecoderConfig::VideoDecoderConfig(VideoCodec codec,
              natural_size, extra_data, is_encrypted);
 }
 
+VideoDecoderConfig::VideoDecoderConfig(const VideoDecoderConfig& other) =
+    default;
+
 VideoDecoderConfig::~VideoDecoderConfig() {}
 
 void VideoDecoderConfig::Initialize(VideoCodec codec,
diff --git a/media/base/video_decoder_config.h b/media/base/video_decoder_config.h
index ae9340a..4a192d6 100644
--- a/media/base/video_decoder_config.h
+++ b/media/base/video_decoder_config.h
@@ -40,6 +40,8 @@ class MEDIA_EXPORT VideoDecoderConfig {
                      const std::vector<uint8_t>& extra_data,
                      bool is_encrypted);
 
+  VideoDecoderConfig(const VideoDecoderConfig& other);
+
   ~VideoDecoderConfig();
 
   // Resets the internal state of this object.
diff --git a/media/capture/video/video_capture_device_info.cc b/media/capture/video/video_capture_device_info.cc
index 3bb4df2..230c16b 100644
--- a/media/capture/video/video_capture_device_info.cc
+++ b/media/capture/video/video_capture_device_info.cc
@@ -15,6 +15,9 @@ VideoCaptureDeviceInfo::VideoCaptureDeviceInfo(
     : name(name), supported_formats(supported_formats) {
 }
 
+VideoCaptureDeviceInfo::VideoCaptureDeviceInfo(
+    const VideoCaptureDeviceInfo& other) = default;
+
 VideoCaptureDeviceInfo::~VideoCaptureDeviceInfo() {
 }
 
diff --git a/media/capture/video/video_capture_device_info.h b/media/capture/video/video_capture_device_info.h
index 3cdb1b5..c34b279 100644
--- a/media/capture/video/video_capture_device_info.h
+++ b/media/capture/video/video_capture_device_info.h
@@ -15,6 +15,7 @@ struct MEDIA_EXPORT VideoCaptureDeviceInfo {
   VideoCaptureDeviceInfo();
   VideoCaptureDeviceInfo(const VideoCaptureDevice::Name& name,
                          const VideoCaptureFormats& supported_formats);
+  VideoCaptureDeviceInfo(const VideoCaptureDeviceInfo& other);
   ~VideoCaptureDeviceInfo();
 
   VideoCaptureDevice::Name name;
diff --git a/media/cast/cast_config.cc b/media/cast/cast_config.cc
index f3b1612..1a619fd 100644
--- a/media/cast/cast_config.cc
+++ b/media/cast/cast_config.cc
@@ -58,6 +58,8 @@ VideoSenderConfig::VideoSenderConfig()
       codec(CODEC_VIDEO_VP8),
       number_of_encode_threads(1) {}
 
+VideoSenderConfig::VideoSenderConfig(const VideoSenderConfig& other) = default;
+
 VideoSenderConfig::~VideoSenderConfig() {}
 
 AudioSenderConfig::AudioSenderConfig()
@@ -72,6 +74,8 @@ AudioSenderConfig::AudioSenderConfig()
       bitrate(kDefaultAudioEncoderBitrate),
       codec(CODEC_AUDIO_OPUS) {}
 
+AudioSenderConfig::AudioSenderConfig(const AudioSenderConfig& other) = default;
+
 AudioSenderConfig::~AudioSenderConfig() {}
 
 FrameReceiverConfig::FrameReceiverConfig()
@@ -84,6 +88,9 @@ FrameReceiverConfig::FrameReceiverConfig()
       target_frame_rate(0),
       codec(CODEC_UNKNOWN) {}
 
+FrameReceiverConfig::FrameReceiverConfig(const FrameReceiverConfig& other) =
+    default;
+
 FrameReceiverConfig::~FrameReceiverConfig() {}
 
 }  // namespace cast
diff --git a/media/cast/cast_config.h b/media/cast/cast_config.h
index e6a0a62..465f924 100644
--- a/media/cast/cast_config.h
+++ b/media/cast/cast_config.h
@@ -59,6 +59,7 @@ enum SuggestedDefaults {
 // http://crbug.com/530839
 struct AudioSenderConfig {
   AudioSenderConfig();
+  AudioSenderConfig(const AudioSenderConfig& other);
   ~AudioSenderConfig();
 
   // Identifier referring to the sender, used by the receiver.
@@ -97,6 +98,7 @@ struct AudioSenderConfig {
 
 struct VideoSenderConfig {
   VideoSenderConfig();
+  VideoSenderConfig(const VideoSenderConfig& other);
   ~VideoSenderConfig();
 
   // Identifier referring to the sender, used by the receiver.
@@ -163,6 +165,7 @@ struct VideoSenderConfig {
 // TODO(miu): Naming and minor type changes are badly needed in a later CL.
 struct FrameReceiverConfig {
   FrameReceiverConfig();
+  FrameReceiverConfig(const FrameReceiverConfig& other);
   ~FrameReceiverConfig();
 
   // The receiver's SSRC identifier.
diff --git a/media/cast/logging/logging_defines.cc b/media/cast/logging/logging_defines.cc
index c3c872a..22f326a 100644
--- a/media/cast/logging/logging_defines.cc
+++ b/media/cast/logging/logging_defines.cc
@@ -43,6 +43,7 @@ FrameEvent::FrameEvent()
       target_bitrate(0),
       encoder_cpu_utilization(-1.0),
       idealized_bitrate_utilization(-1.0) {}
+FrameEvent::FrameEvent(const FrameEvent& other) = default;
 FrameEvent::~FrameEvent() {}
 
 PacketEvent::PacketEvent()
diff --git a/media/cast/logging/logging_defines.h b/media/cast/logging/logging_defines.h
index 00425be..257652d 100644
--- a/media/cast/logging/logging_defines.h
+++ b/media/cast/logging/logging_defines.h
@@ -54,6 +54,7 @@ enum EventMediaType {
 
 struct FrameEvent {
   FrameEvent();
+  FrameEvent(const FrameEvent& other);
   ~FrameEvent();
 
   RtpTimeTicks rtp_timestamp;
diff --git a/media/cast/net/rtcp/rtcp_defines.cc b/media/cast/net/rtcp/rtcp_defines.cc
index b4f363e..f7a1a6c 100644
--- a/media/cast/net/rtcp/rtcp_defines.cc
+++ b/media/cast/net/rtcp/rtcp_defines.cc
@@ -21,6 +21,8 @@ RtcpReceiverEventLogMessage::~RtcpReceiverEventLogMessage() {}
 
 RtcpReceiverFrameLogMessage::RtcpReceiverFrameLogMessage(RtpTimeTicks timestamp)
     : rtp_timestamp_(timestamp) {}
+RtcpReceiverFrameLogMessage::RtcpReceiverFrameLogMessage(
+    const RtcpReceiverFrameLogMessage& other) = default;
 RtcpReceiverFrameLogMessage::~RtcpReceiverFrameLogMessage() {}
 
 RtcpReceiverReferenceTimeReport::RtcpReceiverReferenceTimeReport()
diff --git a/media/cast/net/rtcp/rtcp_defines.h b/media/cast/net/rtcp/rtcp_defines.h
index 69a81bf..98d69bb 100644
--- a/media/cast/net/rtcp/rtcp_defines.h
+++ b/media/cast/net/rtcp/rtcp_defines.h
@@ -69,6 +69,7 @@ typedef std::list<RtcpReceiverEventLogMessage> RtcpReceiverEventLogMessages;
 
 struct RtcpReceiverFrameLogMessage {
   explicit RtcpReceiverFrameLogMessage(RtpTimeTicks rtp_timestamp);
+  RtcpReceiverFrameLogMessage(const RtcpReceiverFrameLogMessage& other);
   ~RtcpReceiverFrameLogMessage();
 
   const RtpTimeTicks rtp_timestamp_;
diff --git a/media/cdm/player_tracker_impl.cc b/media/cdm/player_tracker_impl.cc
index 98f2050..7d5cda3 100644
--- a/media/cdm/player_tracker_impl.cc
+++ b/media/cdm/player_tracker_impl.cc
@@ -15,6 +15,9 @@ PlayerTrackerImpl::PlayerCallbacks::PlayerCallbacks(
     const base::Closure& cdm_unset_cb)
     : new_key_cb(new_key_cb), cdm_unset_cb(cdm_unset_cb) {}
 
+PlayerTrackerImpl::PlayerCallbacks::PlayerCallbacks(
+    const PlayerCallbacks& other) = default;
+
 PlayerTrackerImpl::PlayerCallbacks::~PlayerCallbacks() {
 }
 
diff --git a/media/cdm/player_tracker_impl.h b/media/cdm/player_tracker_impl.h
index e2dc4a5..299593d 100644
--- a/media/cdm/player_tracker_impl.h
+++ b/media/cdm/player_tracker_impl.h
@@ -35,6 +35,7 @@ class MEDIA_EXPORT PlayerTrackerImpl : public PlayerTracker {
   struct PlayerCallbacks {
     PlayerCallbacks(const base::Closure& new_key_cb,
                     const base::Closure& cdm_unset_cb);
+    PlayerCallbacks(const PlayerCallbacks& other);
     ~PlayerCallbacks();
 
     base::Closure new_key_cb;
diff --git a/media/filters/gpu_video_decoder.cc b/media/filters/gpu_video_decoder.cc
index 6801aaf..260bfaa 100644
--- a/media/filters/gpu_video_decoder.cc
+++ b/media/filters/gpu_video_decoder.cc
@@ -53,6 +53,9 @@ GpuVideoDecoder::PendingDecoderBuffer::PendingDecoderBuffer(
     : shm_buffer(s), buffer(b), done_cb(done_cb) {
 }
 
+GpuVideoDecoder::PendingDecoderBuffer::PendingDecoderBuffer(
+    const PendingDecoderBuffer& other) = default;
+
 GpuVideoDecoder::PendingDecoderBuffer::~PendingDecoderBuffer() {}
 
 GpuVideoDecoder::BufferData::BufferData(int32_t bbid,
diff --git a/media/filters/gpu_video_decoder.h b/media/filters/gpu_video_decoder.h
index eb82db6..c615684 100644
--- a/media/filters/gpu_video_decoder.h
+++ b/media/filters/gpu_video_decoder.h
@@ -102,6 +102,7 @@ class MEDIA_EXPORT GpuVideoDecoder
     PendingDecoderBuffer(SHMBuffer* s,
                         const scoped_refptr<DecoderBuffer>& b,
                         const DecodeCB& done_cb);
+    PendingDecoderBuffer(const PendingDecoderBuffer& other);
     ~PendingDecoderBuffer();
     SHMBuffer* shm_buffer;
     scoped_refptr<DecoderBuffer> buffer;
diff --git a/media/filters/video_renderer_algorithm.cc b/media/filters/video_renderer_algorithm.cc
index 230c464..2a98367 100644
--- a/media/filters/video_renderer_algorithm.cc
+++ b/media/filters/video_renderer_algorithm.cc
@@ -22,6 +22,9 @@ VideoRendererAlgorithm::ReadyFrame::ReadyFrame(
       drop_count(0) {
 }
 
+VideoRendererAlgorithm::ReadyFrame::ReadyFrame(const ReadyFrame& other) =
+    default;
+
 VideoRendererAlgorithm::ReadyFrame::~ReadyFrame() {
 }
 
diff --git a/media/filters/video_renderer_algorithm.h b/media/filters/video_renderer_algorithm.h
index 3eea86b..5d1169f 100644
--- a/media/filters/video_renderer_algorithm.h
+++ b/media/filters/video_renderer_algorithm.h
@@ -159,6 +159,7 @@ class MEDIA_EXPORT VideoRendererAlgorithm {
   // Metadata container for enqueued frames.  See |frame_queue_| below.
   struct ReadyFrame {
     ReadyFrame(const scoped_refptr<VideoFrame>& frame);
+    ReadyFrame(const ReadyFrame& other);
     ~ReadyFrame();
 
     // For use with std::lower_bound.
diff --git a/media/formats/webm/tracks_builder.cc b/media/formats/webm/tracks_builder.cc
index 6b2aaea..458f522 100644
--- a/media/formats/webm/tracks_builder.cc
+++ b/media/formats/webm/tracks_builder.cc
@@ -294,6 +294,8 @@ TracksBuilder::Track::Track(int track_num,
   }
 }
 
+TracksBuilder::Track::Track(const Track& other) = default;
+
 int TracksBuilder::Track::GetSize() const {
   return MasterElementSize(kWebMIdTrackEntry, GetPayloadSize());
 }
diff --git a/media/formats/webm/tracks_builder.h b/media/formats/webm/tracks_builder.h
index dc0283e..41d0938 100644
--- a/media/formats/webm/tracks_builder.h
+++ b/media/formats/webm/tracks_builder.h
@@ -83,6 +83,7 @@ class TracksBuilder {
           int audio_channels,
           double audio_sampling_frequency,
           bool allow_invalid_values);
+    Track(const Track& other);
 
     int GetSize() const;
     void Write(uint8_t** buf, int* buf_size) const;
diff --git a/media/formats/webm/webm_cluster_parser.cc b/media/formats/webm/webm_cluster_parser.cc
index e4fb5bb..21c1895 100644
--- a/media/formats/webm/webm_cluster_parser.cc
+++ b/media/formats/webm/webm_cluster_parser.cc
@@ -598,6 +598,8 @@ WebMClusterParser::Track::Track(int track_num,
          default_duration_ > base::TimeDelta());
 }
 
+WebMClusterParser::Track::Track(const Track& other) = default;
+
 WebMClusterParser::Track::~Track() {}
 
 DecodeTimestamp WebMClusterParser::Track::GetReadyUpperBound() {
diff --git a/media/formats/webm/webm_cluster_parser.h b/media/formats/webm/webm_cluster_parser.h
index 3976cfa..c719515 100644
--- a/media/formats/webm/webm_cluster_parser.h
+++ b/media/formats/webm/webm_cluster_parser.h
@@ -55,6 +55,7 @@ class MEDIA_EXPORT WebMClusterParser : public WebMParserClient {
           bool is_video,
           base::TimeDelta default_duration,
           const scoped_refptr<MediaLog>& media_log);
+    Track(const Track& other);
     ~Track();
 
     int track_num() const { return track_num_; }
diff --git a/media/video/video_decode_accelerator.cc b/media/video/video_decode_accelerator.cc
index 0d3887d..4275d5f 100644
--- a/media/video/video_decode_accelerator.cc
+++ b/media/video/video_decode_accelerator.cc
@@ -51,6 +51,9 @@ VideoDecodeAccelerator::SupportedProfile::~SupportedProfile() {}
 
 VideoDecodeAccelerator::Capabilities::Capabilities() : flags(NO_FLAGS) {}
 
+VideoDecodeAccelerator::Capabilities::Capabilities(const Capabilities& other) =
+    default;
+
 VideoDecodeAccelerator::Capabilities::~Capabilities() {}
 
 std::string VideoDecodeAccelerator::Capabilities::AsHumanReadableString()
diff --git a/media/video/video_decode_accelerator.h b/media/video/video_decode_accelerator.h
index 2b5f211..c0f6b1e 100644
--- a/media/video/video_decode_accelerator.h
+++ b/media/video/video_decode_accelerator.h
@@ -38,6 +38,7 @@ class MEDIA_EXPORT VideoDecodeAccelerator {
 
   struct MEDIA_EXPORT Capabilities {
     Capabilities();
+    Capabilities(const Capabilities& other);
     ~Capabilities();
 
     std::string AsHumanReadableString() const;