RFR: 8335967: "text-decoration: none" does not work with "A" HTML tags [v2]

[Alexey Ivanov]

> After I integrated [JDK-8326734](https://bugs.openjdk.org/browse/JDK-8326734), there's no way to remove text decoration from an HTML element. The most common HTML element is `<a>` which is usually rendered _underlined_. You could add an inline style or apply a rule with `text-decoration: none` to remove underline.
> 
> This fix restores this functionality.
> 
> The test contains five cases. The first case ensures the `<a>` element is rendered with underline by default. The second and third cases verify that underline is removed if `text-decoration: none` is added to the `style` attribute or is applied by a style-sheet rule.
> 
> The fourth and fifth cases verify that underline is preserved the containing element, `<p>` in this case, has `text-decoration: underline`.
> 
> These five cases render the same way in browsers. However, the fourth and fifth cases render without underline in JDKs without JDK-8326734.

Alexey Ivanov has updated the pull request incrementally with one additional commit since the last revision:

  Amend the bugid and summary in the test

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/20313/files
  - new: https://git.openjdk.org/jdk/pull/20313/files/d32e02b9..0049b4e5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20313&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20313&range=00-01

  Stats: 4 lines in 1 file changed: 0 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/20313.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20313/head:pull/20313

PR: https://git.openjdk.org/jdk/pull/20313