Describe LiveEdit changes and support preview mode

test/mjsunit/debug-liveedit-breakpoints.js

Index: test/mjsunit/debug-liveedit-breakpoints.js
diff --git a/test/mjsunit/debug-liveedit-breakpoints.js b/test/mjsunit/debug-liveedit-breakpoints.js
index 5c61cf49d2faaddacbb4ee38c64f5f4b9502c1e0..f01a8c481d59165a6d3daa4d930c17ebc10b5610 100644
--- a/test/mjsunit/debug-liveedit-breakpoints.js
+++ b/test/mjsunit/debug-liveedit-breakpoints.js
@@ -72,7 +72,8 @@ var new_source = script.source.replace(function_z_text, "");
 print("new source: " + new_source);
 
 var change_log = new Array();
-Debug.LiveEdit.SetScriptSource(script, new_source, change_log);
+var result = Debug.LiveEdit.SetScriptSource(script, new_source, false, change_log);
+print("Result: " + JSON.stringify(result) + "\n");
 print("Change log: " + JSON.stringify(change_log) + "\n");
 
 var breaks = Debug.scriptBreakPoints();