Include stddef.h for the definition of size_t.

sandbox/win/src/sidestep/preamble_patcher.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.
 
 // Definition of PreamblePatcher
 
 #ifndef SANDBOX_SRC_SIDESTEP_PREAMBLE_PATCHER_H__
 #define SANDBOX_SRC_SIDESTEP_PREAMBLE_PATCHER_H__
 
+#include <stddef.h>
+
 namespace sidestep {
 
 // Maximum size of the preamble stub. We overwrite at least the first 5
 // bytes of the function. Considering the worst case scenario, we need 4
 // bytes + the max instruction size + 5 more bytes for our jump back to
 // the original code. With that in mind, 32 is a good number :)
 const size_t kMaxPreambleStubSize = 32;
 
 // Possible results of patching/unpatching
 enum SideStepError {
@@ skipping 80 matching lines @@
   static SideStepError RawPatchWithStub(void* target_function,
                                         void *replacement_function,
                                         unsigned char* preamble_stub,
                                         size_t stub_size,
                                         size_t* bytes_needed);
 };
 
 };  // namespace sidestep
 
 #endif  // SANDBOX_SRC_SIDESTEP_PREAMBLE_PATCHER_H__