Debugger: make debug code on-stack replacement more robust.

src/x87/assembler-x87.h

Index: src/x87/assembler-x87.h
diff --git a/src/x87/assembler-x87.h b/src/x87/assembler-x87.h
index 5498b8eaedf0acea222f3cadfdb17d42193f9a08..932dac702ab4b7715704cc1a075292bf39b6d9d4 100644
--- a/src/x87/assembler-x87.h
+++ b/src/x87/assembler-x87.h
@@ -954,6 +954,9 @@ class Assembler : public AssemblerBase {
   // Mark address of the ExitJSFrame code.
   void RecordJSReturn();
 
+  // Mark generator continuation.
+  void RecordGeneratorContinuation();
+
   // Mark address of a debug break slot.
   void RecordDebugBreakSlot();
   void RecordDebugBreakSlotForCall(int argc);