[NOT FOR LANDING] Detailed loading traces

net/http/http_response_headers.cc

 // Copyright (c) 2012 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.
 
 // The rules for header parsing were borrowed from Firefox:
 // http://lxr.mozilla.org/seamonkey/source/netwerk/protocol/http/src/nsHttpResponseHead.cpp
 // The rules for parsing content-types were also borrowed from Firefox:
 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834
 
 #include "net/http/http_response_headers.h"
 
 #include <algorithm>
 #include <utility>
 
+#include "base/trace_event/trace_event.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/pickle.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "base/values.h"
@@ skipping 1219 matching lines @@
   EnumerateHeader(nullptr, "Date", &date_header);
   return HttpUtil::HasStrongValidators(GetHttpVersion(),
                                        etag_header,
                                        last_modified_header,
                                        date_header);
 }
 
 // From RFC 2616:
 // Content-Length = "Content-Length" ":" 1*DIGIT
 int64_t HttpResponseHeaders::GetContentLength() const {
+  TRACE_EVENT0("toplevel", "HttpResponseHeaders::GetContentLength");
   return GetInt64HeaderValue("content-length");
 }
 
 int64_t HttpResponseHeaders::GetInt64HeaderValue(
     const std::string& header) const {
   size_t iter = 0;
   std::string content_length_val;
   if (!EnumerateHeader(&iter, header, &content_length_val))
     return -1;
 
@@ skipping 178 matching lines @@
   return true;
 }
 
 bool HttpResponseHeaders::IsChunkEncoded() const {
   // Ignore spurious chunked responses from HTTP/1.0 servers and proxies.
   return GetHttpVersion() >= HttpVersion(1, 1) &&
       HasHeaderValue("Transfer-Encoding", "chunked");
 }
 
 }  // namespace net