Remove description from HTTP/2 RST_STREAM.

net/spdy/spdy_protocol.h

Index: net/spdy/spdy_protocol.h
diff --git a/net/spdy/spdy_protocol.h b/net/spdy/spdy_protocol.h
index c5d66c917d1362c73d819ac6dc2612399fc4557f..9abb3963250a8049ce4a6ffbfbbad31a6df3ec21 100644
--- a/net/spdy/spdy_protocol.h
+++ b/net/spdy/spdy_protocol.h
@@ -723,8 +723,7 @@ class NET_EXPORT_PRIVATE SpdySynReplyIR : public SpdyFrameWithHeaderBlockIR {
 
 class NET_EXPORT_PRIVATE SpdyRstStreamIR : public SpdyFrameWithStreamIdIR {
  public:
-  SpdyRstStreamIR(SpdyStreamId stream_id, SpdyRstStreamStatus status,
-                  base::StringPiece description);
+  SpdyRstStreamIR(SpdyStreamId stream_id, SpdyRstStreamStatus status);
 
   ~SpdyRstStreamIR() override;
 
@@ -735,13 +734,10 @@ class NET_EXPORT_PRIVATE SpdyRstStreamIR : public SpdyFrameWithStreamIdIR {
     status_ = status;
   }
 
-  base::StringPiece description() const { return description_; }
-
   void Visit(SpdyFrameVisitor* visitor) const override;
 
  private:
   SpdyRstStreamStatus status_;
-  base::StringPiece description_;
 
   DISALLOW_COPY_AND_ASSIGN(SpdyRstStreamIR);
 };