Some reorganizing to respond to code review comments
diff --git a/BUILD b/BUILD
index 925e277..cf147fc 100644
--- a/BUILD
+++ b/BUILD
@@ -1573,6 +1573,7 @@
"src/core/ext/transport/chttp2/transport/frame_window_update.cc",
"src/core/ext/transport/chttp2/transport/hpack_encoder.cc",
"src/core/ext/transport/chttp2/transport/hpack_parser.cc",
+ "src/core/ext/transport/chttp2/transport/hpack_mapping.cc",
"src/core/ext/transport/chttp2/transport/hpack_table.cc",
"src/core/ext/transport/chttp2/transport/http2_settings.cc",
"src/core/ext/transport/chttp2/transport/huffsyms.cc",
@@ -1597,6 +1598,7 @@
"src/core/ext/transport/chttp2/transport/frame_window_update.h",
"src/core/ext/transport/chttp2/transport/hpack_encoder.h",
"src/core/ext/transport/chttp2/transport/hpack_parser.h",
+ "src/core/ext/transport/chttp2/transport/hpack_mapping.h",
"src/core/ext/transport/chttp2/transport/hpack_table.h",
"src/core/ext/transport/chttp2/transport/http2_settings.h",
"src/core/ext/transport/chttp2/transport/huffsyms.h",