(WIP) Invalidation during painting (for synchronized painting)

third_party/WebKit/Source/core/paint/InlinePainter.cpp

Index: third_party/WebKit/Source/core/paint/InlinePainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/InlinePainter.cpp b/third_party/WebKit/Source/core/paint/InlinePainter.cpp
index c3e9cfa0009641e9acec169a05e1456f1019e214..38ee3a1ed98769d8d85d5af4477c91f98a10e699 100644
--- a/third_party/WebKit/Source/core/paint/InlinePainter.cpp
+++ b/third_party/WebKit/Source/core/paint/InlinePainter.cpp
@@ -20,17 +20,6 @@ namespace blink {
 
 void InlinePainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
-    if (RuntimeEnabledFeatures::slimmingPaintOffsetCachingEnabled() && !paintInfo.context.paintController().skippingCache()) {
-        if (m_layoutInline.paintOffsetChanged(paintOffset)) {
-            paintInfo.context.paintController().invalidatePaintOffset(m_layoutInline);
-            LineBoxListPainter(*m_layoutInline.lineBoxes()).invalidateLineBoxPaintOffsets(paintInfo);
-        }
-        // Set previousPaintOffset here in case that m_layoutInline paints nothing and no
-        // LayoutObjectDrawingRecorder updates its previousPaintOffset.
-        // TODO(wangxianzhu): Integrate paint offset checking into new paint invalidation.
-        m_layoutInline.mutableForPainting().setPreviousPaintOffset(paintOffset);
-    }
-
     if (paintInfo.phase == PaintPhaseForeground && paintInfo.isPrinting())
         ObjectPainter(m_layoutInline).addPDFURLRectIfNeeded(paintInfo, paintOffset);