D17052: Simplify reference counting of FrameData

[Aleix Pol Gonzalez]

apol created this revision.
apol added reviewers: Plasma, Frameworks.
Herald added a project: Frameworks.
Herald added a subscriber: kde-frameworks-devel.
apol requested review of this revision.

REVISION SUMMARY
  Leverages QSharedPointer for the reference counting.
  Keeps the last value of the cacheId, as it can change sometimes and crash
  the system.

REPOSITORY
  R242 Plasma Framework (Library)

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D17052

AFFECTED FILES
  src/plasma/framesvg.cpp
  src/plasma/private/framesvg_p.h
  src/plasma/private/theme_p.cpp

To: apol, #plasma, #frameworks
Cc: kde-frameworks-devel, michaelh, ngraham, bruns
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