relnote: add new unused functions for client side of QUIC server push.

net/quic/spdy_utils.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_SPDY_UTILS_H_
 #define NET_QUIC_SPDY_UTILS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 25 matching lines @@
   // Parses |data| as a std::string containing serialized HTTP/2 HEADERS frame,
   // populating |trailers| with the key->value std:pairs found.
   // The final offset header will be excluded from |trailers|, and instead the
   // value will be copied to |final_byte_offset|.
   // Returns true on success, false if parsing fails, or invalid keys are found.
   static bool ParseTrailers(const char* data,
                             uint32_t data_len,
                             size_t* final_byte_offset,
                             SpdyHeaderBlock* trailers);
 
+  // Returns URL composed from scheme, authority, and path header
+  // values, or empty string if any of those fields are missing.
+  static std::string GetUrlFromHeaderBlock(const net::SpdyHeaderBlock& headers);
+
+  // Returns true if result of |GetUrlFromHeaderBlock()| is non-empty
+  // and is a well-formed URL.
+  static bool UrlIsValid(const net::SpdyHeaderBlock& headers);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(SpdyUtils);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_SPDY_UTILS_H_