Remove pointer mangling API from trace_event.h and use an addTraceEvent flag instead

base/debug/trace_event_impl.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 BASE_DEBUG_TRACE_EVENT_IMPL_H_
 #define BASE_DEBUG_TRACE_EVENT_IMPL_H_
 #pragma once
 
 #include "build/build_config.h"
@@ skipping 230 matching lines @@
                     unsigned char flags);
   static void AddTraceEventEtw(char phase,
                                const char* name,
                                const void* id,
                                const char* extra);
   static void AddTraceEventEtw(char phase,
                                const char* name,
                                const void* id,
                                const std::string& extra);
 
-  // Mangle |ptr| with a hash based on the process ID so that if |ptr| occurs on
-  // more than one process, it will not collide.
-  unsigned long long GetInterProcessID(void* ptr) const {
-    return static_cast<unsigned long long>(reinterpret_cast<uintptr_t>(ptr)) ^
-           process_id_hash_;
-  }
-
   int process_id() const { return process_id_; }
 
   // Exposed for unittesting:
 
   // Allows deleting our singleton instance.
   static void DeleteForTesting();
 
   // Allows resurrecting our singleton instance post-AtExit processing.
   static void Resurrect();
 
@@ skipping 34 matching lines @@
 
   int process_id_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceLog);
 };
 
 }  // namespace debug
 }  // namespace base
 
 #endif  // BASE_DEBUG_TRACE_EVENT_IMPL_H_