Explicitly declare temporary cooked frames state

src/top.h

Index: src/top.h
diff --git a/src/top.h b/src/top.h
index e20a2a0f137d5afcf4acfc7b843de93a4152c38b..d263777b92f35fea84fb33dcdafa3805b64c3cc5 100644
--- a/src/top.h
+++ b/src/top.h
@@ -40,6 +40,7 @@ namespace internal {
 // Top has static variables used for JavaScript execution.
 
 class SaveContext;  // Forward declaration.
+class ThreadVisitor;  // Defined in v8threads.h
 
 class ThreadLocalTop BASE_EMBEDDED {
  public:
@@ -319,6 +320,8 @@ class Top {
   static void Iterate(ObjectVisitor* v);
   static void Iterate(ObjectVisitor* v, ThreadLocalTop* t);
   static char* Iterate(ObjectVisitor* v, char* t);
+  static void IterateThread(ThreadVisitor* v);
+  static void IterateThread(ThreadVisitor* v, char* t);
 
   // Returns the global object of the current context. It could be
   // a builtin object, or a js global object.