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diff --git a/layout/base/tests/input-maxlength-valid-change.html b/layout/base/tests/input-maxlength-valid-change.html
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+++ b/layout/base/tests/input-maxlength-valid-change.html
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+<!DOCTYPE HTML>
+<html>
+ <!-- Test: input with maxlength is valid if the user edits and it's not too long -->
+ <head>
+ <style>
+ :valid { background-color:green; }
+ :invalid { background-color:red; }
+ * { background-color:white; }
+ </style>
+ <script src="/tests/SimpleTest/EventUtils.js"></script>
+ <script>
+ function runTest() {
+ var input = document.getElementById('input');
+ input.setSelectionRange(input.value.length, input.value.length)
+ input.focus();
+ synthesizeKey("KEY_Backspace"); // so that it becomes invalid first
+ input.blur();
+ input.focus();
+ synthesizeKey("KEY_Backspace");
+ input.blur(); // to hide the caret
+ document.documentElement.className='';
+ }
+ </script>
+ </head>
+ <body onload="runTest()">
+ <input id="input" maxlength="3" value="foooo">
+ </body>
+</html>