Add config change handling to SourceBufferStream & ChunkDemuxer

media/base/stream_parser_buffer.cc

Index: media/base/stream_parser_buffer.cc
diff --git a/media/base/stream_parser_buffer.cc b/media/base/stream_parser_buffer.cc
index 85013723057cf1dd4962658c3a39a9430f3ef811..04f9513464102ac3a2738207633edf0b68aada48 100644
--- a/media/base/stream_parser_buffer.cc
+++ b/media/base/stream_parser_buffer.cc
@@ -32,11 +32,20 @@ StreamParserBuffer::StreamParserBuffer(const uint8* data, int data_size,
                                        bool is_keyframe)
     : DecoderBuffer(data, data_size),
       is_keyframe_(is_keyframe),
-      decode_timestamp_(kNoTimestamp()) {
+      decode_timestamp_(kNoTimestamp()),
+      config_id_(kInvalidConfigId) {
   SetDuration(kNoTimestamp());
 }
 
 StreamParserBuffer::~StreamParserBuffer() {
 }
 
+int StreamParserBuffer::GetConfigId() const {
+  return config_id_;
+}
+
+void StreamParserBuffer::SetConfigId(int config_id) {
+  config_id_ = config_id;
+}
+
 }  // namespace media