Move StackGuard::InterruptRequested into StackLimitCheck.

src/execution.h

Index: src/execution.h
diff --git a/src/execution.h b/src/execution.h
index 551682c2eb65637864e751e555c6a5df98c9565e..2b17c0a66112dd866c512363870172bed975efe0 100644
--- a/src/execution.h
+++ b/src/execution.h
@@ -195,10 +195,7 @@ 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();