Add support for 64-bit Windows build

base/event_trace_provider_win.cc

 // Copyright (c) 2009 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.
 //
 #include "base/event_trace_provider_win.h"
 #include <windows.h>
 #include <cguid.h>
 
 TRACE_GUID_REGISTRATION EtwTraceProvider::obligatory_guid_registration_ = {
   &GUID_NULL,
@@ skipping 81 matching lines @@
 
 ULONG EtwTraceProvider::Log(const EtwEventClass& event_class,
     EtwEventType type, EtwEventLevel level, const char *message) {
   if (NULL == session_handle_ || enable_level_ < level)
     return ERROR_SUCCESS;  // No one listening.
 
   EtwMofEvent<1> event(event_class, type, level);
 
   event.fields[0].DataPtr = reinterpret_cast<ULONG64>(message);
   event.fields[0].Length = message ?
-      sizeof(message[0]) * (1 + strlen(message)) : 0;
+      static_cast<ULONG>(sizeof(message[0]) * (1 + strlen(message))) : 0;
 
   return ::TraceEvent(session_handle_, &event.header);
 }
 
 ULONG EtwTraceProvider::Log(const EtwEventClass& event_class,
     EtwEventType type, EtwEventLevel level, const wchar_t *message) {
   if (NULL == session_handle_ || enable_level_ < level)
     return ERROR_SUCCESS;  // No one listening.
 
   EtwMofEvent<1> event(event_class, type, level);
 
   event.fields[0].DataPtr = reinterpret_cast<ULONG64>(message);
   event.fields[0].Length = message ?
-      sizeof(message[0]) * (1 + wcslen(message)) : 0;
+      static_cast<ULONG>(sizeof(message[0]) * (1 + wcslen(message))) : 0;
 
   return ::TraceEvent(session_handle_, &event.header);
 }
 
 ULONG EtwTraceProvider::Log(EVENT_TRACE_HEADER* event) {
   if (enable_level_ < event->Class.Level)
     return ERROR_SUCCESS;
 
   return ::TraceEvent(session_handle_, event);
 }