RFR: Merge jdk:master [v2]

[Kevin Rushforth]

> Manual merge of `jdk/master` into `lanai/master` since the nightly auto-merge process is offline (see
> [SKARA-764](https://bugs.openjdk.java.net/browse/SKARA-764)).

Kevin Rushforth has updated the pull request with a new target base due to a merge or a rebase. The pull request now
contains 905 commits:

 - Merge jdk:master
 - 8254881: Commit commandbuffer after draw happens through JNI
 - 8254879: Implement JNI path for Draw Poly
 - 8254869: Refactor check_previous_op usage in Mask Fill
 - 8244845: Lanai : J2DDemo - Clipping - Two parallel lines do not appear with AA Rendering
 - 8242924: Selection is not correct in Paint.TextureAnim
   8253994: J2DDemo: Buttcap, SquareCap color is different in AlphaComposite mode
 - 8252726: Lanai: IDEA Editor Rendering  OGL vs Metal 1:2
 - 8254176: Lanai: MTLTexturePool optimize lookup of expired textures
 - Automatic merge of jdk:master into master
 - 8253931: Lanai: MTLTexturePool refactoring
 - ... and 895 more: https://git.openjdk.java.net/lanai/compare/402d01aa...7f3252b9

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

Changes: https://git.openjdk.java.net/lanai/pull/119/files
 Webrev: https://webrevs.openjdk.java.net/?repo=lanai&pr=119&range=01
  Stats: 18043 lines in 92 files changed: 17949 ins; 21 del; 73 mod
  Patch: https://git.openjdk.java.net/lanai/pull/119.diff
  Fetch: git fetch https://git.openjdk.java.net/lanai pull/119/head:pull/119

PR: https://git.openjdk.java.net/lanai/pull/119