Revert of [debugger] flood function for stepping before calling it.

src/js/array.js

Index: src/js/array.js
diff --git a/src/js/array.js b/src/js/array.js
index b29ad781706c1e44f3b257a150939b8b2f5ac4ba..4e3c8a1cfb24c5b95d3219f647ac332a5f3321c9 100644
--- a/src/js/array.js
+++ b/src/js/array.js
@@ -1212,9 +1212,12 @@
   var accumulator = new InternalArray();
   var accumulator_length = 0;
   var is_array = IS_ARRAY(array);
+  var stepping = DEBUG_IS_STEPPING(f);
   for (var i = 0; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
+      // Prepare break slots for debugger step in.
+      if (stepping) %DebugPrepareStepInIfStepping(f);
       if (%_Call(f, receiver, element, i, array)) {
         accumulator[accumulator_length++] = element;
       }
@@ -1241,9 +1244,12 @@
   if (!IS_CALLABLE(f)) throw MakeTypeError(kCalledNonCallable, f);
 
   var is_array = IS_ARRAY(array);
+  var stepping = DEBUG_IS_STEPPING(f);
   for (var i = 0; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
+      // Prepare break slots for debugger step in.
+      if (stepping) %DebugPrepareStepInIfStepping(f);
       %_Call(f, receiver, element, i, array);
     }
   }
@@ -1265,9 +1271,12 @@
   if (!IS_CALLABLE(f)) throw MakeTypeError(kCalledNonCallable, f);
 
   var is_array = IS_ARRAY(array);
+  var stepping = DEBUG_IS_STEPPING(f);
   for (var i = 0; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
+      // Prepare break slots for debugger step in.
+      if (stepping) %DebugPrepareStepInIfStepping(f);
       if (%_Call(f, receiver, element, i, array)) return true;
     }
   }
@@ -1292,9 +1301,12 @@
   if (!IS_CALLABLE(f)) throw MakeTypeError(kCalledNonCallable, f);
 
   var is_array = IS_ARRAY(array);
+  var stepping = DEBUG_IS_STEPPING(f);
   for (var i = 0; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
+      // Prepare break slots for debugger step in.
+      if (stepping) %DebugPrepareStepInIfStepping(f);
       if (!%_Call(f, receiver, element, i, array)) return false;
     }
   }
@@ -1317,9 +1329,12 @@
 
   var accumulator = new InternalArray(length);
   var is_array = IS_ARRAY(array);
+  var stepping = DEBUG_IS_STEPPING(f);
   for (var i = 0; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
+      // Prepare break slots for debugger step in.
+      if (stepping) %DebugPrepareStepInIfStepping(f);
       accumulator[i] = %_Call(f, receiver, element, i, array);
     }
   }
@@ -1482,9 +1497,12 @@
     throw MakeTypeError(kReduceNoInitial);
   }
 
+  var stepping = DEBUG_IS_STEPPING(callback);
   for (; i < length; i++) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
+      // Prepare break slots for debugger step in.
+      if (stepping) %DebugPrepareStepInIfStepping(callback);
       current = callback(current, element, i, array);
     }
   }
@@ -1522,9 +1540,12 @@
     throw MakeTypeError(kReduceNoInitial);
   }
 
+  var stepping = DEBUG_IS_STEPPING(callback);
   for (; i >= 0; i--) {
     if (HAS_INDEX(array, i, is_array)) {
       var element = array[i];
+      // Prepare break slots for debugger step in.
+      if (stepping) %DebugPrepareStepInIfStepping(callback);
       current = callback(current, element, i, array);
     }
   }