sandbox/win: Fix warnings found by clang chromium-style plugin on Windows.

sandbox/win/src/handle_closer.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.
 
 #ifndef SANDBOX_SRC_HANDLE_CLOSER_H_
 #define SANDBOX_SRC_HANDLE_CLOSER_H_
 
 #include <map>
 #include <set>
 
@@ skipping 24 matching lines @@
   size_t num_handle_types;
   struct HandleListEntry handle_entries[1];
 };
 
 SANDBOX_INTERCEPT HandleCloserInfo* g_handle_closer_info;
 
 // Adds handles to close after lockdown.
 class HandleCloser {
  public:
   HandleCloser();
+  ~HandleCloser();
 
   // Adds a handle that will be closed in the target process after lockdown.
   // A NULL value for handle_name indicates all handles of the specified type.
   // An empty string for handle_name indicates the handle is unnamed.
   ResultCode AddHandle(const base::char16* handle_type,
                        const base::char16* handle_name);
 
   // Serializes and copies the closer table into the target process.
   bool InitializeTargetHandles(TargetProcess* target);
 
  private:
   // Calculates the memory needed to copy the serialized handles list (rounded
   // to the nearest machine-word size).
   size_t GetBufferSize();
 
   // Serializes the handle list into the target process.
   bool SetupHandleList(void* buffer, size_t buffer_bytes);
 
   HandleMap handles_to_close_;
 
   DISALLOW_COPY_AND_ASSIGN(HandleCloser);
 };
 
 // Returns the object manager's name associated with a handle
 bool GetHandleName(HANDLE handle, base::string16* handle_name);
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_SRC_HANDLE_CLOSER_H_