Make QuicSpdyStream::ParseHeaderStatusCode() static.

gfe-relnote: n/a, no functional change.
PiperOrigin-RevId: 255237835
Change-Id: I3bb38862e1777cf2511b52424ce2383717f25dfa

quic/core/http/quic_spdy_stream.cc

diff --git a/quic/core/http/quic_spdy_stream.cc b/quic/core/http/quic_spdy_stream.cc
index b7522c0..c42f39c 100644
--- a/quic/core/http/quic_spdy_stream.cc
+++ b/quic/core/http/quic_spdy_stream.cc
@@ -672,8 +672,9 @@
   return headers_decompressed_ && header_list_.empty();
 }
 
+// static
 bool QuicSpdyStream::ParseHeaderStatusCode(const SpdyHeaderBlock& header,
-                                           int* status_code) const {
+                                           int* status_code) {
   SpdyHeaderBlock::const_iterator it = header.find(spdy::kHttp2StatusHeader);
   if (it == header.end()) {
     return false;

quic/core/http/quic_spdy_stream.h

diff --git a/quic/core/http/quic_spdy_stream.h b/quic/core/http/quic_spdy_stream.h
index 1618f0e..b90f680 100644
--- a/quic/core/http/quic_spdy_stream.h
+++ b/quic/core/http/quic_spdy_stream.h
@@ -166,8 +166,8 @@
 
   // Returns true if header contains a valid 3-digit status and parse the status
   // code to |status_code|.
-  bool ParseHeaderStatusCode(const spdy::SpdyHeaderBlock& header,
-                             int* status_code) const;
+  static bool ParseHeaderStatusCode(const spdy::SpdyHeaderBlock& header,
+                                    int* status_code);
 
   // Returns true when all data has been read from the peer, including the fin.
   bool IsDoneReading() const;