| Index: include/v8.h | 
| diff --git a/include/v8.h b/include/v8.h | 
| index 71a1805aafc93b4fe0da8b2b0e3151cb61b59eb1..fc3381042a7c42cfb1c623db136a033adf6af6d8 100644 | 
| --- a/include/v8.h | 
| +++ b/include/v8.h | 
| @@ -4965,9 +4965,9 @@ enum GCType { | 
|  | 
| enum GCCallbackFlags { | 
| kNoGCCallbackFlags = 0, | 
| -  kGCCallbackFlagCompacted = 1 << 0, | 
| kGCCallbackFlagConstructRetainedObjectInfos = 1 << 1, | 
| -  kGCCallbackFlagForced = 1 << 2 | 
| +  kGCCallbackFlagForced = 1 << 2, | 
| +  kGCCallbackFlagSynchronousPhantomCallbackProcessing = 1 << 3 | 
| }; | 
|  | 
| typedef void (*GCPrologueCallback)(GCType type, GCCallbackFlags flags); | 
|  |