[debugger] implement per-function code coverage.

test/mjsunit/regress/regress-crbug-471702.js

Index: test/mjsunit/regress/regress-crbug-471702.js
diff --git a/test/mjsunit/regress/regress-crbug-471702.js b/test/mjsunit/regress/regress-crbug-471702.js
deleted file mode 100644
index dcd9f9bfe4faf0db0b66f9a84d36cbbaa172199c..0000000000000000000000000000000000000000
--- a/test/mjsunit/regress/regress-crbug-471702.js
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright 2015 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --allow-natives-syntax
-
-assertThrows(function() { JSON.stringify(%DebugGetLoadedScripts()); });