Reverting the BOM changes due to security concerns.

test/mjsunit/bom.js

-// Copyright 2008 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.
-
-// According to section 7.1 of EcmaScript-262 format control characters
-// should be removed before parsing. We're following the discussion at
-// https://bugs.webkit.org/show_bug.cgi?id=4931 in only removing the BOM.
-// See also https://bugzilla.mozilla.org/show_bug.cgi?id=274152.
-
-// Ignores BOM (and only BOM) in string literals.
-var format_controls =
-  eval('"\uFEFF\u200F\u200E\u00AD\u2062\u200D\u200C\u200B"');
-assertEquals('\u200F\u200E\u00AD\u2062\u200D\u200C\u200B', 
-             format_controls);
-
-// Ignores BOM in identifiers.
-eval('var x\uFEFFy = 7');
-assertEquals(7, xy);
-
-// Doesn't ignore non-BOM format control characters.
-assertThrows('var y\u200Fx = 7');
-assertThrows('var y\u200Ex = 7');
-assertThrows('var y\u20ADx = 7');
-assertThrows('var y\u2062x = 7');
-assertThrows('var y\u200Dx = 7');
-assertThrows('var y\u200Cx = 7');
-assertThrows('var y\u200Bx = 7');