Prepare scrolling tree to handle > 1 scrolling node
Created attachment 222161 [details] Patch
Created attachment 222162 [details] Patch
Comment on attachment 222162 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=222162&action=review > Source/WebCore/page/scrolling/AsyncScrollingCoordinator.cpp:172 > + m_updateMainFrameScrollPositionTimer.startOneShot(0); Should the timer still have "main frame" in the name?
https://trac.webkit.org/r162736