Split out spdy_log_util from http_log_util.

net/spdy/spdy_log_util.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2017 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_HTTP_HTTP_LOG_UTIL_H_
-#define NET_HTTP_HTTP_LOG_UTIL_H_
+#ifndef NET_SPDY_SPDY_LOG_UTIL_H_
+#define NET_SPDY_SPDY_LOG_UTIL_H_
 
+#include <memory>
 #include <string>
 
 #include "base/strings/string_piece.h"
 #include "net/base/net_export.h"
+#include "net/log/net_log_capture_mode.h"
 #include "net/spdy/spdy_header_block.h"
 
 namespace base {
 class ListValue;
 }  // namespace base
 
 namespace net {
 
-class NetLogCaptureMode;
-
-// Given an HTTP header |header| with value |value|, returns the elided version
-// of the header value at |log_level|.
-NET_EXPORT_PRIVATE std::string ElideHeaderValueForNetLog(
-    NetLogCaptureMode capture_mode,
-    const std::string& header,
-    const std::string& value);
-
 // Given an HTTP/2 GOAWAY frame |debug_data|, returns the elided version
 // according to |capture_mode|.
 NET_EXPORT_PRIVATE std::string ElideGoAwayDebugDataForNetLog(
     NetLogCaptureMode capture_mode,
     base::StringPiece debug_data);
 
 // Given a SpdyHeaderBlock, return its base::ListValue representation.
-std::unique_ptr<base::ListValue> ElideSpdyHeaderBlockForNetLog(
-    const SpdyHeaderBlock& headers,
-    NetLogCaptureMode capture_mode);
+NET_EXPORT_PRIVATE std::unique_ptr<base::ListValue>
+ElideSpdyHeaderBlockForNetLog(const SpdyHeaderBlock& headers,
+                              NetLogCaptureMode capture_mode);
 
 }  // namespace net
 
-#endif  // NET_HTTP_HTTP_LOG_UTIL_H_
+#endif  // NET_SPDY_SPDY_LOG_UTIL_H_