Fix build problems on Windows 64-bit by casting.

src/circular-queue-inl.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 20 matching lines @@
 #include "circular-queue.h"
 
 namespace v8 {
 namespace internal {
 
 
 template<typename Record>
 CircularQueue<Record>::CircularQueue(int desired_buffer_size_in_bytes)
     : buffer_(NewArray<Record>(desired_buffer_size_in_bytes / sizeof(Record))),
       buffer_end_(buffer_ + desired_buffer_size_in_bytes / sizeof(Record)),
-      enqueue_semaphore_(OS::CreateSemaphore((buffer_end_ - buffer_) - 1)),
+      enqueue_semaphore_(
+          OS::CreateSemaphore(static_cast<int>(buffer_end_ - buffer_) - 1)),
       enqueue_pos_(buffer_),
       dequeue_pos_(buffer_) {
   // To be able to distinguish between a full and an empty queue
   // state, the queue must be capable of containing at least 2
   // records.
   ASSERT((buffer_end_ - buffer_) >= 2);
 }
 
 
 template<typename Record>
@@ skipping 39 matching lines @@
 
 void SamplingCircularQueue::WrapPositionIfNeeded(
     SamplingCircularQueue::Cell** pos) {
   if (**pos == kEnd) *pos = buffer_;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_CIRCULAR_BUFFER_INL_H_