<AWT Dev> RFR: 8264125: Specification of Taskbar::getIconImage doesn't mention that the returned image might not be equal to the Taskbar::setIconImage one. (eg on Mac OS) [v4]

[Alexander Zvegintsev]

> This fix is to explicitly specify that `Taskbar::getIconImage` may return an object different from passed to `Taskbar::setIconImage`.
> 
> Actually it is always returns a different object on macOS(the only OS which supports this feature), but I want to save some options if we decide to rework this.

Alexander Zvegintsev has updated the pull request incrementally with one additional commit since the last revision:

  header fix

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3250/files
  - new: https://git.openjdk.java.net/jdk/pull/3250/files/b5432e78..312abff4

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3250&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3250&range=02-03

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3250.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3250/head:pull/3250

PR: https://git.openjdk.java.net/jdk/pull/3250