Fix incorrect config id being associated with post splice buffer.

media/filters/source_buffer_stream.h

Index: media/filters/source_buffer_stream.h
diff --git a/media/filters/source_buffer_stream.h b/media/filters/source_buffer_stream.h
index d1fb29a1adedcddc39d3ce4286303d317cf6fe2b..dfdc363c9387c3e8f7ab43e1142a310c002b8c83 100644
--- a/media/filters/source_buffer_stream.h
+++ b/media/filters/source_buffer_stream.h
@@ -398,6 +398,9 @@ class MEDIA_EXPORT SourceBufferStream {
   // handled out next.
   size_t splice_buffers_index_;
 
+  // Indicates that all pre splice buffers have been handed out.
+  bool pre_splice_complete_;
+
   // Indicates that splice frame generation is enabled.
   const bool splice_frames_enabled_;