Windows: VirtualFree with MEM_RELEASE wants 0 instead of the region's size.

runtime/bin/file_win.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "bin/file.h"
 
 #include <fcntl.h>     // NOLINT
@@ skipping 98 matching lines @@
   if (!result) {
     Log::PrintErr("VirtualProtect failed %d\n", GetLastError());
     VirtualFree(addr, 0, MEM_RELEASE);
     return NULL;
   }
   return new MappedMemory(addr, length);
 }
 
 
 void MappedMemory::Unmap() {
-  bool result = VirtualFree(address_, size_, MEM_RELEASE);
+  BOOL result = VirtualFree(address_, 0, MEM_RELEASE);
   ASSERT(result);
   address_ = 0;
   size_ = 0;
 }
 
 
 int64_t File::Read(void* buffer, int64_t num_bytes) {
   ASSERT(handle_->fd() >= 0);
   return read(handle_->fd(), buffer, num_bytes);
 }
@@ skipping 598 matching lines @@
     return kIdentical;
   } else {
     return kDifferent;
   }
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)