Revert "Introduce API to temporarily interrupt long running JavaScript code."

src/execution.h

Index: src/execution.h
diff --git a/src/execution.h b/src/execution.h
index 3e62d8730ab471bc71f9d0ce5dc603be0356854e..eda416c0da5409f82e9dda4bbbb749d24bf0ea01 100644
--- a/src/execution.h
+++ b/src/execution.h
@@ -43,8 +43,7 @@ enum InterruptFlag {
   TERMINATE = 1 << 4,
   GC_REQUEST = 1 << 5,
   FULL_DEOPT = 1 << 6,
-  INSTALL_CODE = 1 << 7,
-  API_INTERRUPT = 1 << 8
+  INSTALL_CODE = 1 << 7
 };
 
 
@@ -223,11 +222,6 @@ class StackGuard {
   void FullDeopt();
   void Continue(InterruptFlag after_what);
 
-  void RequestInterrupt(InterruptCallback callback, void* data);
-  void ClearInterrupt();
-  bool IsAPIInterrupt();
-  void InvokeInterruptCallback();
-
   // This provides an asynchronous read of the stack limits for the current
   // thread.  There are no locks protecting this, but it is assumed that you
   // have the global V8 lock if you are using multiple V8 threads.
@@ -313,9 +307,6 @@ class StackGuard {
     int nesting_;
     int postpone_interrupts_nesting_;
     int interrupt_flags_;
-
-    InterruptCallback interrupt_callback_;
-    void* interrupt_callback_data_;
   };
 
   // TODO(isolates): Technically this could be calculated directly from a