RFR: 8342911: Remove calls to doPrivileged in controls [v3]

[Andy Goryachev]

> Removes doPrivileged in the following module:
> 
> - javafx.controls
> 
> See JDK-8342441 for details.
> 
> As a helpful hint for reviewers, I recommend reviewing this using the "Hide whitespace" option.

Andy Goryachev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - Merge remote-tracking branch 'origin/master' into 8342911.do.priviliged.controls
 - review comments
 - Merge remote-tracking branch 'origin/master' into 8342911.do.priviliged.controls
 - 8342911: Remove calls to doPrivileged in controls

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/1615/files
  - new: https://git.openjdk.org/jfx/pull/1615/files/5511ac11..c94df6ab

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1615&range=02
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1615&range=01-02

  Stats: 2516 lines in 82 files changed: 186 ins; 1236 del; 1094 mod
  Patch: https://git.openjdk.org/jfx/pull/1615.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1615/head:pull/1615

PR: https://git.openjdk.org/jfx/pull/1615