Propagate SetDecoderHeaderTableDebugVisitor to the nested SpdyFramerDecoderAdapter.

net/spdy/spdy_framer_decoder_adapter.h

Index: net/spdy/spdy_framer_decoder_adapter.h
diff --git a/net/spdy/spdy_framer_decoder_adapter.h b/net/spdy/spdy_framer_decoder_adapter.h
index 9e2a4a34bc6c00b87667934c2196db46397be537..1e0726407299439d278a3247fe04d4d78d99aeb5 100644
--- a/net/spdy/spdy_framer_decoder_adapter.h
+++ b/net/spdy/spdy_framer_decoder_adapter.h
@@ -37,6 +37,10 @@ class SpdyFramerDecoderAdapter {
     return debug_visitor_;
   }
 
+  // Set debug callbacks to be called from the HPACK decoder.
+  virtual void SetDecoderHeaderTableDebugVisitor(
+      std::unique_ptr<HpackHeaderTable::DebugVisitorInterface> visitor) = 0;
+
   // Sets whether or not ProcessInput returns after finishing a frame, or
   // continues processing additional frames. Normally ProcessInput processes
   // all input, but this method enables the caller (and visitor) to work with