Debugger: require debugger to be active when dealing with breaks.

test/mjsunit/debug-liveedit-patch-positions.js

Index: test/mjsunit/debug-liveedit-patch-positions.js
diff --git a/test/mjsunit/debug-liveedit-patch-positions.js b/test/mjsunit/debug-liveedit-patch-positions.js
index b0d3c20d9a745e749e3b87f6a90194f46356137b..c669b5e86252781ba44884996d2c2c16b5bd0337 100644
--- a/test/mjsunit/debug-liveedit-patch-positions.js
+++ b/test/mjsunit/debug-liveedit-patch-positions.js
@@ -33,6 +33,7 @@
 // corresponding byte-code PCs should coincide before change and after it.
 
 Debug = debug.Debug
+Debug.setListener(function() {});
 
 eval(
     "function F1() {  return 5; }\n" +
@@ -124,3 +125,5 @@ print(pcArray2);
 if (pcArray1 && pcArray2) {
   assertArrayEquals(pcArray1, pcArray2);
 }
+
+Debug.setListener(null);