Use a monotonic clock (TimeTicks) to report network times to WebCore.

webkit/glue/weburlloader_impl.cc

 // Copyright (c) 2011 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.
 
 // An implementation of WebURLLoader in terms of ResourceLoaderBridge.
 
 #include "webkit/glue/weburlloader_impl.h"
 
 #include "base/file_path.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 153 matching lines @@
   response->setRemotePort(info.socket_address.port());
   response->setConnectionID(info.connection_id);
   response->setConnectionReused(info.connection_reused);
   response->setDownloadFilePath(FilePathToWebString(info.download_file_path));
 
   const ResourceLoadTimingInfo& timing_info = info.load_timing;
   if (!timing_info.base_time.is_null()) {
     WebURLLoadTiming timing;
     timing.initialize();
     timing.setRequestTime(timing_info.base_time.ToDoubleT());
+    timing.setMonotonicRequestTime(
+        timing_info.base_ticks /
+        static_cast<double>(base::Time::kMicrosecondsPerSecond));
     timing.setProxyStart(timing_info.proxy_start);
     timing.setProxyEnd(timing_info.proxy_end);
     timing.setDNSStart(timing_info.dns_start);
     timing.setDNSEnd(timing_info.dns_end);
     timing.setConnectStart(timing_info.connect_start);
     timing.setConnectEnd(timing_info.connect_end);
     timing.setSSLStart(timing_info.ssl_start);
     timing.setSSLEnd(timing_info.ssl_end);
     timing.setSendStart(timing_info.send_start);
     timing.setSendEnd(timing_info.send_end);
@@ skipping 539 matching lines @@
 
 void WebURLLoaderImpl::cancel() {
   context_->Cancel();
 }
 
 void WebURLLoaderImpl::setDefersLoading(bool value) {
   context_->SetDefersLoading(value);
 }
 
 }  // namespace webkit_glue