RFR: 8275715: D3D pipeline processes multiple PaintEvent at initial drawing [v2]

[Masanori Yano]

> Could you please review the 8275715 bug fixes?
> 
> I think D3DScreenUpdateManager posts unnecessary PaintEvent during processing PaintEvent. When the validate method is called from createGraphics, repaintPeerTarget should not be called.

Masanori Yano has updated the pull request incrementally with one additional commit since the last revision:

  8275715: D3D pipeline processes multiple PaintEvent at initial drawing

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6064/files
  - new: https://git.openjdk.java.net/jdk/pull/6064/files/fcf36233..26dcc7b4

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6064&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6064&range=00-01

  Stats: 8 lines in 1 file changed: 6 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6064.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6064/head:pull/6064

PR: https://git.openjdk.java.net/jdk/pull/6064