Remove some illegal enum forward declarations

sandbox/win/src/interception_internal.h

 // Copyright (c) 2006-2010 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.
 
 // Defines InterceptionManager, the class in charge of setting up interceptions
 // for the sandboxed process. For more details see:
 // http://dev.chromium.org/developers/design-documents/sandbox .
 
 #ifndef SANDBOX_SRC_INTERCEPTION_INTERNAL_H_
 #define SANDBOX_SRC_INTERCEPTION_INTERNAL_H_
 
 #include <stddef.h>
 
+#include "sandbox/win/src/interceptors.h"
 #include "sandbox/win/src/sandbox_types.h"
 
 namespace sandbox {
 
 const int kMaxThunkDataBytes = 64;
 
-enum InterceptorId;
-
 // The following structures contain variable size fields at the end, and will be
 // used to transfer information between two processes. In order to guarantee
 // our ability to follow the chain of structures, the alignment should be fixed,
 // hence this pragma.
 #pragma pack(push, 4)
 
 // Structures for the shared memory that contains patching information
 // for the InterceptionAgent.
 // A single interception:
 struct FunctionInfo {
@@ skipping 37 matching lines @@
   int dummy;                      // Improve alignment.
 #endif
   ThunkData thunks[1];
 };
 
 #pragma pack(pop)
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_SRC_INTERCEPTION_INTERNAL_H_