| Index: include/v8.h
 | 
| diff --git a/include/v8.h b/include/v8.h
 | 
| index 35822e53d8fec12ee4c0c0ec9fe5a00534e59666..4e1f1a2d68c1a33a4f5743a162a82782f4740b35 100644
 | 
| --- a/include/v8.h
 | 
| +++ b/include/v8.h
 | 
| @@ -5246,6 +5246,7 @@ enum GCCallbackFlags {
 | 
|    kGCCallbackFlagForced = 1 << 2,
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|    kGCCallbackFlagSynchronousPhantomCallbackProcessing = 1 << 3,
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|    kGCCallbackFlagCollectAllAvailableGarbage = 1 << 4,
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| +  kGCCallbackFlagCollectAllExternalMemory = 1 << 5,
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|  };
 | 
|  
 | 
|  typedef void (*GCCallback)(GCType type, GCCallbackFlags flags);
 | 
| 
 |