Fix break of build.

src/v8checks.h

 // Copyright 2006-2008 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
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
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 //       from this software without specific prior written permission.
 //
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 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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-#ifndef V8_CHECKS_H_
-#define V8_CHECKS_H_
+#ifndef V8_V8CHECKS_H_
+#define V8_V8CHECKS_H_
 
 #include "checks.h"
 
 void API_Fatal(const char* location, const char* format, ...);
 
 namespace v8 {
   class Value;
   template <class T> class Handle;
 
 namespace internal {
@@ skipping 14 matching lines @@
                        const char* expected_source,
                        v8::Handle<v8::Value> expected,
                        const char* value_source,
                        v8::Handle<v8::Value> value);
 
 #define ASSERT_TAG_ALIGNED(address) \
   ASSERT((reinterpret_cast<intptr_t>(address) & HeapObjectTagMask()) == 0)
 
 #define ASSERT_SIZE_TAG_ALIGNED(size) ASSERT((size & HeapObjectTagMask()) == 0)
 
-#endif  // V8_CHECKS_H_
+#endif  // V8_V8CHECKS_H_