Move StackGuard::InterruptRequested into StackLimitCheck.

src/execution.h

Index: src/execution.h
diff --git a/src/execution.h b/src/execution.h
index d783e5c28b80b7fa34dbf989418665ecd5fe9550..2c07a64aaecc5409064ba1bc5eaf2f2edcf73880 100644
--- a/src/execution.h
+++ b/src/execution.h
@@ -200,10 +200,7 @@ class StackGuard final {
   // If the stack guard is triggered, but it is not an actual
   // stack overflow, then handle the interruption accordingly.
   Object* HandleInterrupts();
-
-  bool InterruptRequested() { return GetCurrentStackPosition() < climit(); }
-
-  void CheckAndHandleGCInterrupt();
+  void HandleGCInterrupt();
 
  private:
   StackGuard();