Shorten autogenerated error message.

test/mjsunit/error-tostring-omit.js

 // Copyright 2013 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.
 
-"use strict"
-
-function f() {
-  throw new Error("test stack");
+function veryLongString() {
+  return "Lorem ipsum dolor sit amet, consectetur adipiscing elit." +
+         "Nam vulputate metus est. Maecenas quis pellentesque eros," +
+         "ac mattis augue. Nam porta purus vitae tincidunt blandit." +
+         "Aliquam lacus dui, blandit id consectetur id, hendrerit ut" +
+         "felis. Class aptent taciti sociosqu ad litora torquent per" +
+         "conubia nostra, per inceptos himenaeos. Ut posuere eros et" +
+         "tempus luctus. Nullam condimentum aliquam odio, at dignissim" +
+         "augue tincidunt in. Nam mattis vitae mauris eget dictum." +
+         "Nam accumsan dignissim turpis a turpis duis.";
 }
 
-var error_stack = "";
+
+var re = /omitted/;
+
 try {
-  f.call(null);
+  veryLongString.nonexistentMethod();
 } catch (e) {
-  error_stack = e.stack;
+  assertTrue(e.message.length < 350);
+  assertTrue(re.test(e.message));
 }
 
-assertTrue(error_stack.indexOf("test stack") > 0);
-assertTrue(error_stack.indexOf("illegal") < 0);
+try {
+  veryLongString().nonexistentMethod();
+} catch (e) {
+  assertTrue(e.message.length < 350);
+  assertTrue(re.test(e.message));
+}
+
+try {
+  throw Error(veryLongString());
+} catch (e) {
+  assertEquals(veryLongString(), e.message);
+}