D19012: [qpa] Drop PlatformContextWayland which uses wayland egl for OpenGL

graesslin created this revision.
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REVISION SUMMARY
  Using the Wayland protocol for OpenGL is no longer used or useful. KWin
  internal windows only use OpenGL through QtQuick. We either have the
  sharing context (KWin uses OpenGL for compositing) or we have the
  QPainter compositor which also turns QtQuick to use software renderer.
  
  Thus a situation where the Wayland platform context is useful doesn't
  exist any more. Removing it helps getting the QPA plugin Wayland free.

TEST PLAN
  Run nested KWin triggering Outline once with OpenGL and once
  with QPainter compositor.

REPOSITORY
  R108 KWin

BRANCH
  drop-platform-context

REVISION DETAIL
  https://phabricator.kde.org/D19012

AFFECTED FILES
  plugins/qpa/CMakeLists.txt
  plugins/qpa/integration.cpp
  plugins/qpa/integration.h
  plugins/qpa/platformcontextwayland.cpp
  plugins/qpa/platformcontextwayland.h
  plugins/qpa/window.cpp
  plugins/qpa/window.h

To: graesslin, #kwin
Cc: kwin, jraleigh, GB_2, mkulinski, ragreen, jackyalcine, Pitel, iodelay, bwowk, ZrenBot, ngraham, alexeymin, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart