bool TiledBackingStore::visibleAreaIsCovered() const { return coverageRatio(visibleContentsRect()) == 1.0f; }
bool TiledBackingStore::visibleAreaIsCovered() const { IntRect boundedVisibleContentsRect = intersection(m_client->tiledBackingStoreVisibleRect(), m_client->tiledBackingStoreContentsRect()); return coverageRatio(boundedVisibleContentsRect) == 1.0f; }