Some reorganizing to respond to code review comments
diff --git a/grpc.gemspec b/grpc.gemspec
index c8e58fa..f5cbf79 100644
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -195,6 +195,7 @@
   s.files += %w( src/core/ext/transport/chttp2/transport/frame_settings.h )
   s.files += %w( src/core/ext/transport/chttp2/transport/frame_window_update.h )
   s.files += %w( src/core/ext/transport/chttp2/transport/hpack_encoder.h )
+  s.files += %w( src/core/ext/transport/chttp2/transport/hpack_mapping.h )
   s.files += %w( src/core/ext/transport/chttp2/transport/hpack_parser.h )
   s.files += %w( src/core/ext/transport/chttp2/transport/hpack_table.h )
   s.files += %w( src/core/ext/transport/chttp2/transport/http2_settings.h )
@@ -617,6 +618,7 @@
   s.files += %w( src/core/ext/transport/chttp2/transport/frame_settings.cc )
   s.files += %w( src/core/ext/transport/chttp2/transport/frame_window_update.cc )
   s.files += %w( src/core/ext/transport/chttp2/transport/hpack_encoder.cc )
+  s.files += %w( src/core/ext/transport/chttp2/transport/hpack_mapping.cc )
   s.files += %w( src/core/ext/transport/chttp2/transport/hpack_parser.cc )
   s.files += %w( src/core/ext/transport/chttp2/transport/hpack_table.cc )
   s.files += %w( src/core/ext/transport/chttp2/transport/http2_settings.cc )