[Reland] Remove PaintInfo's paintingRoot

third_party/WebKit/Source/core/paint/InlineFlowBoxPainter.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 "core/paint/InlineFlowBoxPainter.h"
 
 #include "core/layout/LayoutBlock.h"
 #include "core/layout/LayoutInline.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/api/LineLayoutBoxModel.h"
@@ skipping 27 matching lines @@
         return;
     }
 
     if (paintInfo.phase == PaintPhaseForeground) {
         // Paint our background, border and box-shadow.
         paintBoxDecorationBackground(paintInfo, paintOffset, overflowRect);
     }
 
     // Paint our children.
     PaintInfo childInfo(paintInfo);
-    LayoutObject* inlineFlowBoxLayoutObject = LineLayoutPaintShim::layoutObjectFrom(m_inlineFlowBox.lineLayoutItem());
-    if (childInfo.paintingRoot && childInfo.paintingRoot->isDescendantOf(inlineFlowBoxLayoutObject))
-        childInfo.paintingRoot = 0;
-    else
-        childInfo.updatePaintingRootForChildren(inlineFlowBoxLayoutObject);
-
     for (InlineBox* curr = m_inlineFlowBox.firstChild(); curr; curr = curr->nextOnLine()) {
         if (curr->lineLayoutItem().isText() || !curr->boxModelObject().hasSelfPaintingLayer())
             curr->paint(childInfo, paintOffset, lineTop, lineBottom);
     }
 }
 
 void InlineFlowBoxPainter::paintFillLayers(const PaintInfo& paintInfo, const Color& c, const FillLayer& fillLayer, const LayoutRect& rect, SkXfermode::Mode op)
 {
     // FIXME: This should be a for loop or similar. It's a little non-trivial to do so, however, since the layers need to be
     // painted in reverse order.
@@ skipping 112 matching lines @@
         // We have a border image that spans multiple lines.
         adjustedClipRect = pixelSnappedIntRect(clipRectForNinePieceImageStrip(m_inlineFlowBox, borderImage, adjustedFrameRect));
         return PaintBordersWithClip;
     }
     return DontPaintBorders;
 }
 
 void InlineFlowBoxPainter::paintBoxDecorationBackground(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, const LayoutRect& cullRect)
 {
     ASSERT(paintInfo.phase == PaintPhaseForeground);
-    LayoutObject* inlineFlowBoxLayoutObject = LineLayoutPaintShim::layoutObjectFrom(m_inlineFlowBox.lineLayoutItem());
-    if (!paintInfo.shouldPaintWithinRoot(inlineFlowBoxLayoutObject) || m_inlineFlowBox.lineLayoutItem().style()->visibility() != VISIBLE)
+    if (m_inlineFlowBox.lineLayoutItem().style()->visibility() != VISIBLE)
         return;
 
     // You can use p::first-line to specify a background. If so, the root line boxes for
     // a line may actually have to paint a background.
+    LayoutObject* inlineFlowBoxLayoutObject = LineLayoutPaintShim::layoutObjectFrom(m_inlineFlowBox.lineLayoutItem());
     const ComputedStyle* styleToUse = m_inlineFlowBox.lineLayoutItem().style(m_inlineFlowBox.isFirstLineStyle());
     bool shouldPaintBoxDecorationBackground;
     if (m_inlineFlowBox.parent())
         shouldPaintBoxDecorationBackground = inlineFlowBoxLayoutObject->hasBoxDecorationBackground();
     else
         shouldPaintBoxDecorationBackground = m_inlineFlowBox.isFirstLineStyle() && styleToUse != m_inlineFlowBox.lineLayoutItem().style();
 
     if (!shouldPaintBoxDecorationBackground)
         return;
 
@@ skipping 34 matching lines @@
         LayoutRect imageStripPaintRect = paintRectForImageStrip(adjustedPaintOffset, frameRect.size(), LTR);
         GraphicsContextStateSaver stateSaver(paintInfo.context);
         paintInfo.context.clip(adjustedClipRect);
         BoxPainter::paintBorder(*toLayoutBoxModelObject(LineLayoutPaintShim::layoutObjectFrom(m_inlineFlowBox.boxModelObject())), paintInfo, imageStripPaintRect, m_inlineFlowBox.lineLayoutItem().styleRef(m_inlineFlowBox.isFirstLineStyle()));
         break;
     }
 }
 
 void InlineFlowBoxPainter::paintMask(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
-    if (!paintInfo.shouldPaintWithinRoot(LineLayoutPaintShim::layoutObjectFrom(m_inlineFlowBox.lineLayoutItem())) || m_inlineFlowBox.lineLayoutItem().style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask)
+    if (m_inlineFlowBox.lineLayoutItem().style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask)
         return;
 
     LayoutRect frameRect = frameRectClampedToLineTopAndBottomIfNeeded();
 
     // Move x/y to our coordinates.
     LayoutRect localRect(frameRect);
     m_inlineFlowBox.flipForWritingMode(localRect);
     LayoutPoint adjustedPaintOffset = paintOffset + localRect.location();
 
     const NinePieceImage& maskNinePieceImage = m_inlineFlowBox.lineLayoutItem().style()->maskBoxImage();
@@ skipping 67 matching lines @@
             rect.setHeight(logicalHeight);
         } else {
             rect.setX(logicalTop);
             rect.setWidth(logicalHeight);
         }
     }
     return rect;
 }
 
 } // namespace blink