Baseline changes of merged commits from JDK mainline.

[david-beaumont]

THIS IS NOT FOR CODE REVIEW - DO NOT REVIEW THIS

This a baseline PR that merges all the work I need from mainline JDK on which the preview mode work is done.

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Progress

• Change must not contain extraneous whitespace

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/valhalla.git pull/1596/head:pull/1596
$ git checkout pull/1596

Update a local copy of the PR:
$ git checkout pull/1596
$ git pull https://git.openjdk.org/valhalla.git pull/1596/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1596

View PR using the GUI difftool:
$ git pr show -t 1596

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/valhalla/pull/1596.diff

[bridgekeeper]

👋 Welcome back david-beaumont! A progress list of the required criteria for merging this PR into lworld will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

@david-beaumont this pull request can not be integrated into lworld due to one or more merge conflicts. To resolve these merge conflicts and update this pull request you can run the following commands in the local repository for your personal fork:

git checkout jdk_8352750_baseline
git fetch https://git.openjdk.org/valhalla.git lworld
git merge FETCH_HEAD
# resolve conflicts and follow the instructions given by git merge
git commit -m "Merge lworld"
git push