RFR: 8284888 : [macos] javax/swing/JInternalFrame/8146321/JInternalFrameIconTest.java failed with "NimbusLookAndFeel] : ERROR: icon and imageIcon not same." [v3]

[Prasanta Sadhukhan]

> Test used to fail in specific CI macos M1 system owing to miniscule color difference 
> 
> 
> x 0 y 0 red1 171 red2 171 green1 174 green2 175 blue1 184 blue2 184
> x 0 y 1 red1 172 red2 173 green1 177 green2 177 blue1 185 blue2 185
> x 0 y 2 red1 173 red2 174 green1 177 green2 178 blue1 187 blue2 187
> x 0 y 6 red1 0 red2 0 green1 1 green2 0 blue1 0 blue2 0
> x 0 y 15 red1 1 red2 0 green1 0 green2 0 blue1 0 blue2 0
> 
> 
> SInce we already have color-tolerance check present, there is no need of exact color value check.
> Also, made the frame undecorated and remove unneeded library being built. 
> Several iterations of the test passed in the same system (where it used to fail 4/10) along with other platforms (link in JBS)

Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:

  Modify icon capture area

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8380/files
  - new: https://git.openjdk.java.net/jdk/pull/8380/files/a04c742b..4413bccc

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8380&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8380&range=01-02

  Stats: 36 lines in 1 file changed: 17 ins; 4 del; 15 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8380.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8380/head:pull/8380

PR: https://git.openjdk.java.net/jdk/pull/8380