Add color metadata info to VideoDecoderConfig.

media/base/video_decoder_config.cc

Index: media/base/video_decoder_config.cc
diff --git a/media/base/video_decoder_config.cc b/media/base/video_decoder_config.cc
index ddceabb4357c2a75844b76b197c1bd36ae31f8ef..b0bd28c0cc8d956102368480e001caeb80604c57 100644
--- a/media/base/video_decoder_config.cc
+++ b/media/base/video_decoder_config.cc
@@ -67,6 +67,14 @@ VideoDecoderConfig::VideoDecoderConfig(const VideoDecoderConfig& other) =
 
 VideoDecoderConfig::~VideoDecoderConfig() {}
 
+void VideoDecoderConfig::SetColorMetadata(const ColorMetadata& color_metadata) {
+  color_metadata_ = color_metadata;
+}
+
+base::Optional<ColorMetadata> VideoDecoderConfig::GetColorMetadata() const {
+  return color_metadata_;
+}
+
 void VideoDecoderConfig::Initialize(VideoCodec codec,
                                     VideoCodecProfile profile,
                                     VideoPixelFormat format,