Add color metadata info to VideoDecoderConfig.

media/formats/webm/webm_video_client.cc

Index: media/formats/webm/webm_video_client.cc
diff --git a/media/formats/webm/webm_video_client.cc b/media/formats/webm/webm_video_client.cc
index 73bd095b854b73afd57276d232e7032cd3c4b543..e67c33ee4f838390320effe64fdbfaa79c24e7e9 100644
--- a/media/formats/webm/webm_video_client.cc
+++ b/media/formats/webm/webm_video_client.cc
@@ -28,6 +28,7 @@ void WebMVideoClient::Reset() {
   display_height_ = -1;
   display_unit_ = -1;
   alpha_mode_ = -1;
+  colour_parsed_ = false;
 }
 
 bool WebMVideoClient::InitializeConfig(
@@ -96,9 +97,26 @@ bool WebMVideoClient::InitializeConfig(
   config->Initialize(video_codec, profile, format, COLOR_SPACE_HD_REC709,
                      coded_size, visible_rect, natural_size, codec_private,
                      encryption_scheme);
+  if (colour_parsed_)
+    config->SetColorMetadata(colour_parser_.GetColorMetadata());
   return config->IsValidConfig();
 }
 
+WebMParserClient* WebMVideoClient::OnListStart(int id) {
+  if (id == kWebMIdColour) {
+    colour_parsed_ = false;
+    return &colour_parser_;
+  }
+
+  return this;
+}
+
+bool WebMVideoClient::OnListEnd(int id) {
+  if (id == kWebMIdColour)
+    colour_parsed_ = true;
+  return true;
+}
+
 bool WebMVideoClient::OnUInt(int id, int64_t val) {
   int64_t* dst = NULL;