isForMainFrame    309 Source/core/page/scrolling/ScrollingCoordinator.cpp     bool isMainFrame = isForMainFrame(scrollableArea);
isForMainFrame    359 Source/core/page/scrolling/ScrollingCoordinator.cpp         bool layerScrollShouldFireGraphicsLayerDidScroll = isForMainFrame(scrollableArea) && !pinchVirtualViewportEnabled;
isForMainFrame    125 Source/core/page/scrolling/ScrollingCoordinator.h     bool isForMainFrame(ScrollableArea*) const;