Fix tracing 64-bit to 32-bit truncations

base/debug/trace_event.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.
 
 // This header file defines the set of trace_event macros without specifying
 // how the events actually get collected and stored. If you need to expose trace
 // events to some other universe, you can copy-and-paste this file as well as
 // trace_event.h, modifying the macros contained there as necessary for the
 // target platform. The end result is that multiple libraries can funnel events
 // through to a shared trace event collector.
@@ skipping 985 matching lines @@
 
 // TraceID encapsulates an ID that can either be an integer or pointer. Pointers
 // are by default mangled with the Process ID so that they are unlikely to
 // collide when the same pointer is used on different processes.
 class TraceID {
  public:
   class DontMangle {
    public:
     explicit DontMangle(const void* id)
         : data_(static_cast<unsigned long long>(
-              reinterpret_cast<unsigned long>(id))) {}
+              reinterpret_cast<uintptr_t>(id))) {}
     explicit DontMangle(unsigned long long id) : data_(id) {}
     explicit DontMangle(unsigned long id) : data_(id) {}
     explicit DontMangle(unsigned int id) : data_(id) {}
     explicit DontMangle(unsigned short id) : data_(id) {}
     explicit DontMangle(unsigned char id) : data_(id) {}
     explicit DontMangle(long long id)
         : data_(static_cast<unsigned long long>(id)) {}
     explicit DontMangle(long id)
         : data_(static_cast<unsigned long long>(id)) {}
     explicit DontMangle(int id)
@@ skipping 21 matching lines @@
     explicit ForceMangle(int id)
         : data_(static_cast<unsigned long long>(id)) {}
     explicit ForceMangle(short id)
         : data_(static_cast<unsigned long long>(id)) {}
     explicit ForceMangle(signed char id)
         : data_(static_cast<unsigned long long>(id)) {}
     unsigned long long data() const { return data_; }
    private:
     unsigned long long data_;
   };
-
   TraceID(const void* id, unsigned char* flags)
       : data_(static_cast<unsigned long long>(
-              reinterpret_cast<unsigned long>(id))) {
+              reinterpret_cast<uintptr_t>(id))) {
     *flags |= TRACE_EVENT_FLAG_MANGLE_ID;
   }
   TraceID(ForceMangle id, unsigned char* flags) : data_(id.data()) {
     *flags |= TRACE_EVENT_FLAG_MANGLE_ID;
   }
   TraceID(DontMangle id, unsigned char* flags) : data_(id.data()) {
   }
   TraceID(unsigned long long id, unsigned char* flags)
       : data_(id) { (void)flags; }
   TraceID(unsigned long id, unsigned char* flags)
@@ skipping 449 matching lines @@
   const char* name_;
   IDType id_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceScopedTrackableObject);
 };
 
 } // namespace debug
 } // namespace base
 
 #endif /* BASE_DEBUG_TRACE_EVENT_H_ */