[Isolates] Merge crankshaft (r5922 from bleeding_edge).

test/mjsunit/debug-liveedit-breakpoints.js

 // Copyright 2010 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 44 matching lines @@
 + "  }\n"
 + "}\n"
 );
 
 
 assertEquals(25, F25());
 assertEquals(26, F26());
 
 var script = Debug.findScript(F25);
 
+assertEquals(0, Debug.scriptBreakPoints().length);
+
 Debug.setScriptBreakPoint(Debug.ScriptBreakPointType.ScriptId, script.id, 1, 1, "true || false || false");
 Debug.setScriptBreakPoint(Debug.ScriptBreakPointType.ScriptId, script.id, 6, 1, "true || false || false");
 Debug.setScriptBreakPoint(Debug.ScriptBreakPointType.ScriptId, script.id, 14, 1, "true || false || false");
 
 assertEquals(3, Debug.scriptBreakPoints().length);
 
 var new_source = script.source.replace(function_z_text, "");
 print("new source: " + new_source);
 
 var change_log = new Array();
@@ skipping 14 matching lines @@
     breakpoints_in_script++;
   }
 }
 
 assertEquals(3, breakpoints_in_script);
 
 // Check 2 breakpoints. The one in deleted function should have been moved somewhere.
 assertTrue(break_position_map[1]);
 assertTrue(break_position_map[11]);
 
+// Delete all breakpoints to make this test reentrant.
+var breaks = Debug.scriptBreakPoints();
+var breaks_ids = [];
+
+for (var i = 0; i < breaks.length; i++) {
+  breaks_ids.push(breaks[i].number());
+}
+
+for (var i = 0; i < breaks_ids.length; i++) {
+  Debug.clearBreakPoint(breaks_ids[i]);
+}
+
+assertEquals(0, Debug.scriptBreakPoints().length);