webOS: Share images even if cache is false

Regardless Image::cache property, pixmap will be shared between images
having same source.
Image::cache property had two aspect of internal functionality.
 1. Share image instance if source file is same.
 2. Store cache for a while even if unreferenced.
So we couldn't choose one of them with existing the cache property.
In webOS, sharing image instance is quite natural. So by default, the
sharing is always supported regardless the cache property.
And the property will only cares the 2nd functionality to store cache.

Pick-to: 5.15
Change-Id: I68208cf633ce2afd5f086a61dcc77d0f3d0da037
Task-number: QTBUG-83115
Reviewed-by: Risto Avila <risto.avila@qt.io>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

0 files changed, 0 insertions, 0 deletions