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

ipc/ipc_message_utils.h

 // 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.
 
 #ifndef IPC_IPC_MESSAGE_UTILS_H_
 #define IPC_IPC_MESSAGE_UTILS_H_
 #pragma once
 
 #include <algorithm>
 #include <map>
@@ skipping 86 matching lines @@
 };
 
 class FilePath;
 class NullableString16;
 
 namespace base {
 class DictionaryValue;
 class ListValue;
 class Time;
 class TimeDelta;
+class TimeTicks;
 struct FileDescriptor;
 }
 
 namespace IPC {
 
 struct ChannelHandle;
 
 //-----------------------------------------------------------------------------
 // An iterator class for reading the fields contained within a Message.
 
@@ skipping 207 matching lines @@
 };
 
 template <>
 struct IPC_EXPORT ParamTraits<base::TimeDelta> {
   typedef base::TimeDelta param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m, void** iter, param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
+template <>
+struct ParamTraits<base::TimeTicks> {
+  typedef base::TimeTicks param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
 #if defined(OS_WIN)
 template <>
 struct ParamTraits<LOGFONT> {
   typedef LOGFONT param_type;
   static void Write(Message* m, const param_type& p) {
     m->WriteData(reinterpret_cast<const char*>(&p), sizeof(LOGFONT));
   }
   static bool Read(const Message* m, void** iter, param_type* r) {
     const char *data;
     int data_size = 0;
@@ skipping 749 matching lines @@
     ReplyParam p(a, b, c, d, e);
     WriteParam(reply, p);
   }
 };
 
 //-----------------------------------------------------------------------------
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_MESSAGE_UTILS_H_