[debugger] remove step count parameter from prepare step.

test/mjsunit/debug-stepout-recursive-function.js

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 12 matching lines @@
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --expose-debug-as debug
 // Get the Debug object exposed from the debug context global object.
 Debug = debug.Debug
 
 var exception = null;
-var step_out_count = 1;
 
 // Simple debug event handler which counts the number of breaks hit and steps.
 var break_point_hit_count = 0;
 function listener(event, exec_state, event_data, data) {
   try {
     if (event == Debug.DebugEvent.Break) {
       break_point_hit_count++;
       // Continue stepping until returned to bottom frame.
       if (exec_state.frameCount() > 1) {
-        exec_state.prepareStep(Debug.StepAction.StepOut, step_out_count);
+        exec_state.prepareStep(Debug.StepAction.StepOut);
       }
 
     }
   } catch(e) {
     exception = e;
   }
 
 };
 
 function BeginTest(name) {
@@ skipping 19 matching lines @@
   }
   if (x < 2) {
     return 1;
   } else {
     return x*fact(x-1);
   }
 }
 
 BeginTest('Test 1');
 shouldBreak = function(x) { return x == 3; };
-step_out_count = 1;
 fact(3);
 EndTest(2);
 
 BeginTest('Test 2');
 shouldBreak = function(x) { return x == 2; };
-step_out_count = 1;
 fact(3);
 EndTest(3);
 
 BeginTest('Test 3');
 shouldBreak = function(x) { return x == 1; };
-step_out_count = 2;
 fact(3);
-EndTest(2);
+EndTest(4);
 
 BeginTest('Test 4');
 shouldBreak = function(x) { return x == 1 || x == 3; };
-step_out_count = 2;
 fact(3);
-EndTest(3);
+EndTest(5);
 
 // Get rid of the debug event listener.
 Debug.setListener(null);