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Change-Id: Iefd67a0461d9016b8ba0f3371df7ec6d42e188c5
Reviewed-on: http://codereview.qt-project.org/4321Reviewed-by: hjk <qthjk@ovi.com>

Task-number: QTCREATORBUG-2424

Change-Id: I8b73d583be1ee7183f4074bce49d5390e38631a2

Reviewed-by: hjk

Introduce some more private classes for the coreplugin,
use header include convention
<QtModule/QClass>, de-qobjectify VariableManager.

thus fixing the exit warning:
"~QX11PixmapData(): QPixmap objects must be destroyed..."

Acked-by: con

session restore

  * Use id() for methods returning a string used to represent
    some type of object.
  * Use displayName() for strings that are meant to be user
    visible.
  * Quieten some warnings while touching the files anyway.
  * Move Factories to their products in the plugins where that
    was not done before.

Reviewed-by: dt