[Rev 01] RFR: 8234471: Canvas in webview displayed with wrong scale on Windows

[Arun Joseph]

> This bug can be reproduced when the screen resolution is at 125%, 150% and 175% for Windows, which correpsonds to `pixelScale` values of 1.25, 1.5 and 1.75, respectively.
> 
> Issue: The rectangle inside canvas is rendered on `pixelScale` while the borders are rendered on `Math.ceil(pixelScale)`
> 
> Fix: Use `Math.ceil(pixelScale)` for calculating `pixelScaleTransform`

The pull request has been updated with 1 additional commit.

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Added commits:
 - ea422a78: Added CanvasTest

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/62/files
  - new: https://git.openjdk.java.net/jfx/pull/62/files/fde17b8c..ea422a78

Webrevs:
 - full: https://webrevs.openjdk.java.net/jfx/62/webrev.01
 - incr: https://webrevs.openjdk.java.net/jfx/62/webrev.00-01

  Stats: 133 lines in 1 file changed: 133 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jfx/pull/62.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/62/head:pull/62

PR: https://git.openjdk.java.net/jfx/pull/62