Move key frame flag from StreamParserBuffer to DecoderBuffer

media/base/stream_parser_buffer.h

Index: media/base/stream_parser_buffer.h
diff --git a/media/base/stream_parser_buffer.h b/media/base/stream_parser_buffer.h
index 1651dce48559af96c013ffe1c8c47817fef04a9d..8e04527afe31af220ec91d9e7ac527ecd6058cc0 100644
--- a/media/base/stream_parser_buffer.h
+++ b/media/base/stream_parser_buffer.h
@@ -116,7 +116,6 @@ class MEDIA_EXPORT StreamParserBuffer : public DecoderBuffer {
       const uint8* data, int data_size,
       const uint8* side_data, int side_data_size, bool is_keyframe, Type type,
       TrackId track_id);
-  bool IsKeyframe() const { return is_keyframe_; }
 
   // Decode timestamp. If not explicitly set, or set to kNoTimestamp(), the
   // value will be taken from the normal timestamp.
@@ -178,7 +177,6 @@ class MEDIA_EXPORT StreamParserBuffer : public DecoderBuffer {
                      TrackId track_id);
   ~StreamParserBuffer() override;
 
-  bool is_keyframe_;
   DecodeTimestamp decode_timestamp_;
   int config_id_;
   Type type_;