RFR: 8342914: Remove calls to doPrivileged in swt [v2]

[Andy Goryachev]

> Removes doPrivileged in the following module:
> 
> - javafx.swt
> 
> 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:

 - review comments
 - Merge remote-tracking branch 'origin/master' into 8342914.do.privileged.swt
 - Merge remote-tracking branch 'origin/master' into 8342914.do.privileged.swt
 - 8342914: Remove calls to doPrivileged in swt

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/1611/files
  - new: https://git.openjdk.org/jfx/pull/1611/files/5b4c25f9..e5586724

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1611&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1611&range=00-01

  Stats: 76 lines in 6 files changed: 30 ins; 39 del; 7 mod
  Patch: https://git.openjdk.org/jfx/pull/1611.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1611/head:pull/1611

PR: https://git.openjdk.org/jfx/pull/1611