Implement a paint offset cache for slimming paint v2

Source/core/paint/FrameSetPainter.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/paint/FrameSetPainter.h"
 
 #include "core/html/HTMLFrameSetElement.h"
 #include "core/layout/LayoutFrameSet.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
@@ skipping 52 matching lines @@
 }
 
 static bool shouldPaintBorderAfter(const LayoutFrameSet::GridAxis& axis, size_t index)
 {
     // Should not paint a border after the last frame along the axis.
     return index + 1 < axis.m_sizes.size() && axis.m_allowBorder[index + 1];
 }
 
 void FrameSetPainter::paintBorders(const PaintInfo& paintInfo, const LayoutPoint& adjustedPaintOffset)
 {
-    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_layoutFrameSet, paintInfo.phase))
+    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_layoutFrameSet, paintInfo.phase, adjustedPaintOffset))
         return;
 
     LayoutRect adjustedFrameRect(adjustedPaintOffset, m_layoutFrameSet.size());
-    LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutFrameSet, paintInfo.phase, adjustedFrameRect);
+    LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutFrameSet, paintInfo.phase, adjustedFrameRect, adjustedPaintOffset);
 
     LayoutUnit borderThickness = m_layoutFrameSet.frameSet()->border();
     if (!borderThickness)
         return;
 
     LayoutObject* child = m_layoutFrameSet.firstChild();
     size_t rows = m_layoutFrameSet.rows().m_sizes.size();
     size_t cols = m_layoutFrameSet.columns().m_sizes.size();
     LayoutUnit yPos = 0;
     for (size_t r = 0; r < rows; r++) {
@@ skipping 46 matching lines @@
     LayoutObject* child = m_layoutFrameSet.firstChild();
     if (!child)
         return;
 
     LayoutPoint adjustedPaintOffset = paintOffset + m_layoutFrameSet.location();
     paintChildren(paintInfo, adjustedPaintOffset);
     paintBorders(paintInfo, adjustedPaintOffset);
 }
 
 } // namespace blink