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aroben@apple.com authored
CACFLayerTreeHost doesn't support any other use pattern. Reviewed by Sam Weinig. * platform/graphics/ca/win/CACFLayerTreeHost.cpp: (WebCore::CACFLayerTreeHost::CACFLayerTreeHost): Initialize new member. (WebCore::CACFLayerTreeHost::setWindow): Assert that we transition from not having a window, to having a window, to not having a window just once over the lifetime of this object. * platform/graphics/ca/win/CACFLayerTreeHost.h: Added m_state. git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76763 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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