Fix bug in JSON.stringify where Boolean objects are incorrectly

unwrapped.

This fixes issue 752.
Review URL: http://codereview.chromium.org/2845023

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4946 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/json.js

@@ -207,7 +207,7 @@ function JSONSerialize(key, holder, replacer, stack, indent, gap) {
     } else if (IS_STRING_WRAPPER(value)) {
       value = $String(value);
     } else if (IS_BOOLEAN_WRAPPER(value)) {
-      value = $Boolean(value);
+      value =  %_ValueOf(value);
     }
   }
   switch (typeof value) {

test/mjsunit/regress/regress-752.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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// 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.
+
+// Test that JSON.stringify correctly unwraps Boolean objects.
+
+// See: http://code.google.com/p/v8/issues/detail?id=752
+
+function replacer(key, value) {
+  return value === 42 ? new Boolean(false) : value;
+}
+
+assertEquals(JSON.stringify([42], replacer), "[false]");