Convert fast/dom/Range/range-expand.html with testharness

This patch converts the layout test with W3C testharness to allow
cross-platform evaluation of the test cases.

Change-Id: Ifba919b388f8a6c6de062f8615d0547fac2d2ca6
Reviewed-on: https://chromium-review.googlesource.com/c/1336661Reviewed-by: Yoichi Osato <yoichio@chromium.org>
Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Xiaocheng Hu <xiaochengh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608259}

third_party/WebKit/LayoutTests/fast/dom/Range/range-expand-expected.txt

-CONSOLE WARNING: line 57: 'Range.expand()' is deprecated. Please use 'Selection.modify()' instead.
-This is the begin of a block. A block is a collection of sentences. Each sentence begins with capital letter and ends with a punctuation.
-
-Now, a sentence is divided into multiple lines.
-
-Roll the mouse around the page. The coordinates of the mouse pointer are currently atop an element
-whose ID is:"".
-
-Cell A1	Cell B1
-Cell A2	Cell B2
-Section 1
-
-text.
-
-Section 2
-
-text.
-
-Here is a positioned element.
-在甲型H1N1流感可能出现大流行的警告声中，昨天召开的江苏省2009-2010年度流感防制研讨会注定与往年不同。每年都会召开的一次例会，今年足足提前了一个月；会上研讨的主题，已从以前的季节性流感，变成以甲型H1N1流感为重点。
-בלשכת שר החוץ הגיבו להתקפות עליו בעקבות הנחייתו לדרוש מהמועמדים לקורס צוערים שירות צבאי או לאומי: "המתקיפים צבועים, מי שרוצה לייצג את המדינה רוצה גם לשרת אותה"