[Webkit-unassigned] [Bug 156790] Position of WebGL <canvas> on iOS is incorrect with CSS borders

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156790

--- Comment #7 from Antoine Quint <graouts at webkit.org> ---
So, the contentsScale is set to the device pixel ratio on Mac only in `-(id)initWithGraphicsContext3D:(GraphicsContext3D*)context`, while we set a transform with a scale set to the device pixel ratio on iOS only in `PlatformCALayerRemoteCustom::PlatformCALayerRemoteCustom()`.

Overriding `-(void)setPosition:(CGPoint)position` on WebGLLayer to account for the device pixel ratio fixes the issue, but I'm not sure this is the right fix.

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