Kills TraceTicks, which was functionally the same as TimeTicks

ipc/ipc_message_utils.h

 // 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.
 
 #ifndef IPC_IPC_MESSAGE_UTILS_H_
 #define IPC_IPC_MESSAGE_UTILS_H_
 
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 41 matching lines @@
 #endif
 
 namespace base {
 class DictionaryValue;
 class FilePath;
 class ListValue;
 class NullableString16;
 class Time;
 class TimeDelta;
 class TimeTicks;
-class TraceTicks;
 struct FileDescriptor;
 
 #if (defined(OS_MACOSX) && !defined(OS_IOS)) || defined(OS_WIN)
 class SharedMemoryHandle;
 #endif  // (defined(OS_MACOSX) && !defined(OS_IOS)) || defined(OS_WIN)
 }
 
 namespace IPC {
 
 struct ChannelHandle;
@@ skipping 505 matching lines @@
 struct IPC_EXPORT ParamTraits<base::TimeTicks> {
   typedef base::TimeTicks param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m,
                    base::PickleIterator* iter,
                    param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
 template <>
-struct IPC_EXPORT ParamTraits<base::TraceTicks> {
-  typedef base::TraceTicks param_type;
-  static void Write(Message* m, const param_type& p);
-  static bool Read(const Message* m,
-                   base::PickleIterator* iter,
-                   param_type* r);
-  static void Log(const param_type& p, std::string* l);
-};
-
-template <>
 struct ParamTraits<base::Tuple<>> {
   typedef base::Tuple<> param_type;
   static void Write(Message* m, const param_type& p) {
   }
   static bool Read(const Message* m,
                    base::PickleIterator* iter,
                    param_type* r) {
     return true;
   }
   static void Log(const param_type& p, std::string* l) {
@@ skipping 458 matching lines @@
   template <typename... Ts>
   static void WriteReplyParams(Message* reply, Ts... args) {
     ReplyParam p(args...);
     WriteParam(reply, p);
   }
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_MESSAGE_UTILS_H_