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andersca@apple.com authored
Reviewed by Dan Bernstein. DrawingAreaProxyImpl::paint should return the unpainted region https://bugs.webkit.org/show_bug.cgi?id=52918 * UIProcess/API/mac/WKView.mm: (-[WKView drawRect:]): Add unpaintedRegion parameter. * UIProcess/BackingStore.h: (WebKit::BackingStore::size): Add a size getter. * UIProcess/DrawingAreaProxyImpl.cpp: (WebKit::DrawingAreaProxyImpl::paint): Initialize the unpainted region to the dirty region, then subtract the painted region. git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76393 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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