../../../Source/WebKit2/WebProcess/Plugins/PluginView.cpp: In member function ‘virtual void WebKit::PluginView::paint(WebCore::GraphicsContext*, const WebCore::IntRect&)’: ../../../Source/WebKit2/WebProcess/Plugins/PluginView.cpp:592:57: error: ‘contentsScaleFactor’ was not declared in this scope
Fixed by r99093.