Add support for 64-bit Windows build

base/event_trace_provider_win.h

 // 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.
 //
 // Declaration of a Windows event trace provider class, to allow using
 // Windows Event Tracing for logging transport and control.
 #ifndef BASE_EVENT_TRACE_PROVIDER_WIN_H_
 #define BASE_EVENT_TRACE_PROVIDER_WIN_H_
 
 #include <windows.h>
@@ skipping 38 matching lines @@
     header.Size = sizeof(Super);
     header.Guid = event_class;
     header.Class.Type = type;
     header.Class.Version = version;
     header.Class.Level = level;
     header.Flags = WNODE_FLAG_TRACED_GUID | WNODE_FLAG_USE_MOF_PTR;
   }
 
   void SetField(int field, size_t size, const void *data) {
     // DCHECK(field < N);
-    if (field < N) {
+    if ((field < N) && (size <= kuint32max)) {
       fields[field].DataPtr = reinterpret_cast<ULONG64>(data);
-      fields[field].Length = size;
+      fields[field].Length = static_cast<ULONG>(size);
     }
   }
 
   EVENT_TRACE_HEADER* get() { return& header; }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(EtwMofEvent);
 };
 
 // Trace provider with Event Tracing for Windows. The trace provider
@@ skipping 74 matching lines @@
   EtwEventLevel enable_level_;
 
   // We don't use this, but on XP we're obliged to pass one in to
   // RegisterTraceGuids. Non-const, because that's how the API needs it.
   static TRACE_GUID_REGISTRATION obligatory_guid_registration_;
 
   DISALLOW_COPY_AND_ASSIGN(EtwTraceProvider);
 };
 
 #endif  // BASE_EVENT_TRACE_PROVIDER_WIN_H_