8281711: Cherry-pick WebKit 613.1 stabilization fixes

[kevinrushforth]

Clean backport to jfx11u. I tested this along with the other VS 2019 and WebKit 613.1 fixes together in the test-kcr-11.0.15 branch.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8281711: Cherry-pick WebKit 613.1 stabilization fixes

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jfx11u pull/79/head:pull/79
$ git checkout pull/79

Update a local copy of the PR:
$ git checkout pull/79
$ git pull https://git.openjdk.java.net/jfx11u pull/79/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 79

View PR using the GUI difftool:
$ git pr show -t 79

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jfx11u/pull/79.diff

[bridgekeeper]

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[openjdk]

This backport pull request has now been updated with issue and summary from the original commit.

[openjdk]

@kevinrushforth This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8281711: Cherry-pick WebKit 613.1 stabilization fixes

Stabilization fixes from WebKitGTK 2.34.5

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been no new commits pushed to the master branch. If another commit should be pushed before you perform the /integrate command, your PR will be automatically rebased. If you prefer to avoid any potential automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[kevinrushforth]

/integrate

[openjdk]

Going to push as commit eda6480.

[openjdk]

@kevinrushforth Pushed as commit eda6480.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.

[mlbridge]

Webrevs

• 00: Full (fa51e2c8)