[liveedit] reimplement frame restarting.

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index cd5867689efe0efde0ced8c0998964465f6f5cf8..e918b47341b9ac4e00a0e1be1e3c3c48c8951e95 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -1082,6 +1082,9 @@ class ExternalReference BASE_EMBEDDED {
   // Used to check for suspended generator, used for stepping across await call.
   static ExternalReference debug_suspended_generator_address(Isolate* isolate);
 
+  // Used to store the frame pointer to drop to when restarting a frame.
+  static ExternalReference debug_new_fp_address(Isolate* isolate);
+
 #ifndef V8_INTERPRETED_REGEXP
   // C functions called from RegExp generated code.